Description of problem:
When execute {"execute":"qom-get","arguments":{"path":"/machine","property":"rtc-time"}} in the qemu monitor cmmand line, it's found not supported

Version-Release number of selected component (if applicable):
Host kernel:3.10.0-201.el7.ppc64
Guest kernel:3.10.0-195.el7.ppc64/3.10.0-196.ael7a.ppc64le
Qemu-kvm version:
qemu-img-rhev-2.1.2-14.el7.ppc64
qemu-kvm-tools-rhev-2.1.2-14.el7.ppc64
qemu-kvm-common-rhev-2.1.2-14.el7.ppc64
qemu-kvm-rhev-2.1.2-14.el7.ppc64
qemu-kvm-rhev-debuginfo-2.1.2-14.el7.ppc64

How reproducible:
100%

Steps to Reproduce:
1.Start a guest with following command:
/usr/libexec/qemu-kvm -machine accel=kvm -name rhel7.1-1 -m 16384 -realtime mlock=off -smp 32,sockets=1,cores=4,threads=8 -uuid 95346a10-1828-403a-a610-ac5a52a29428 -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/rhel7.1-1.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=2006-06-06,clock=host,driftfix=slew -no-shutdown -boot strict=on -device usb-ehci,id=usb,bus=pci.0,addr=0x2 -device pci-ohci,id=usb1,bus=pci.0,addr=0x1 -device spapr-vscsi,id=scsi0,reg=0x1000 -device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x3 -drive file=/home/ngu/rhel7.1-1.qcow2,if=none,id=drive-scsi0-0-0-0,format=qcow2,cache=none -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1 -netdev tap,id=hostnet0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown -device spapr-vlan,netdev=hostnet0,id=net0,mac=52:54:00:c4:e7:24,reg=0x2000 -device usb-kbd,id=input0 -device usb-mouse,id=input1 -vnc 0:14 -device VGA,id=video0,bus=pci.0,addr=0x4 -msg timestamp=on

2.Connect to its monitor with command "nc -U /var/lib/libvirt/qemu/rhel7.1-1201-1.monitor" in the host
3.Execute {"execute":"qmp_capabilities"} in above monitor connection
4.Then execute {"execute":"qom-get","arguments":{"path":"/machine","property":"rtc-time"}} in above monitor connection

Actual results:
{"error": {"class": "GenericError", "desc": "Property '.rtc-time' not found"}}

Expected results:
{"return":{"tm_year":114,"tm_sec":16,"tm_hour":11,"tm_min":51,"tm_mon":11,"tm_mday":10} as that in x86_64 system


Additional info:
Following is a full cmd line output:
[root@ibm-p8-kvm-01-qe ~]# nc -U /var/lib/libvirt/qemu/rhel7.1-1.monitor
{"QMP": {"version": {"qemu": {"micro": 2, "minor": 1, "major": 2}, "package": " (qemu-kvm-rhev-2.1.2-14.el7)"}, "capabilities": []}}
{"execute":"qmp_capabilities"}
{"return": {}}
{"execute":"query-commands"}
{"return": [{"name": "query-acpi-ospm-status"}, {"name": "query-memory-devices"}, {"name": "query-memdev"}, {"name": "query-named-block-nodes"}, {"name": "blockdev-add"}, {"name": "query-rx-filter"}, {"name": "chardev-remove"}, {"name": "chardev-add"}, {"name": "query-tpm-types"}, {"name": "query-tpm-models"}, {"name": "query-tpm"}, {"name": "query-target"}, {"name": "query-cpu-definitions"}, {"name": "query-machines"}, {"name": "device-list-properties"}, {"name": "qom-list-types"}, {"name": "change-vnc-password"}, {"name": "nbd-server-stop"}, {"name": "nbd-server-add"}, {"name": "nbd-server-start"}, {"name": "qom-get"}, {"name": "qom-set"}, {"name": "qom-list"}, {"name": "query-block-jobs"}, {"name": "query-balloon"}, {"name": "query-migrate-capabilities"}, {"name": "migrate-set-capabilities"}, {"name": "query-migrate"}, {"name": "query-command-line-options"}, {"name": "query-uuid"}, {"name": "query-name"}, {"name": "query-vnc"}, {"name": "query-mice"}, {"name": "query-status"}, {"name": "query-kvm"}, {"name": "query-pci"}, {"name": "query-iothreads"}, {"name": "query-cpus"}, {"name": "query-blockstats"}, {"name": "query-block"}, {"name": "query-chardev-backends"}, {"name": "query-chardev"}, {"name": "query-events"}, {"name": "query-commands"}, {"name": "query-version"}, {"name": "human-monitor-command"}, {"name": "qmp_capabilities"}, {"name": "add_client"}, {"name": "expire_password"}, {"name": "set_password"}, {"name": "block_set_io_throttle"}, {"name": "block_passwd"}, {"name": "query-fdsets"}, {"name": "remove-fd"}, {"name": "add-fd"}, {"name": "closefd"}, {"name": "getfd"}, {"name": "set_link"}, {"name": "balloon"}, {"name": "change-backing-file"}, {"name": "drive-mirror"}, {"name": "blockdev-snapshot-delete-internal-sync"}, {"name": "blockdev-snapshot-internal-sync"}, {"name": "blockdev-snapshot-sync"}, {"name": "transaction"}, {"name": "block-job-complete"}, {"name": "block-job-resume"}, {"name": "block-job-pause"}, {"name": "block-job-cancel"}, {"name": "block-job-set-speed"}, {"name": "drive-backup"}, {"name": "block-commit"}, {"name": "block-stream"}, {"name": "block_resize"}, {"name": "object-del"}, {"name": "object-add"}, {"name": "netdev_del"}, {"name": "netdev_add"}, {"name": "query-dump-guest-memory-capability"}, {"name": "dump-guest-memory"}, {"name": "client_migrate_info"}, {"name": "migrate_set_downtime"}, {"name": "migrate_set_speed"}, {"name": "query-migrate-cache-size"}, {"name": "migrate-set-cache-size"}, {"name": "migrate_cancel"}, {"name": "migrate"}, {"name": "xen-set-global-dirty-log"}, {"name": "xen-save-devices-state"}, {"name": "ringbuf-read"}, {"name": "ringbuf-write"}, {"name": "inject-nmi"}, {"name": "pmemsave"}, {"name": "memsave"}, {"name": "cpu-add"}, {"name": "cpu"}, {"name": "send-key"}, {"name": "device_del"}, {"name": "device_add"}, {"name": "system_powerdown"}, {"name": "system_reset"}, {"name": "system_wakeup"}, {"name": "cont"}, {"name": "stop"}, {"name": "__com.redhat_qxl_screendump"}, {"name": "screendump"}, {"name": "change"}, {"name": "__com.redhat_drive_del"}, {"name": "__com.redhat_drive_add"}, {"name": "eject"}, {"name": "quit"}]}
{"execute":"qom-get","arguments":{"path":"/machine","property":"rtc-time"}}
{"error": {"class": "GenericError", "desc": "Property '.rtc-time' not found"}}