The latest upstream code contains support for the new hardware and few bugfixes.
Installed RHEL-7.6-20180820.n.0 on a test system and confirmed that alsa-lib package available is the 1.1.6-2.el7 versions. Given that this is rebase to upstream with no specific testable scenario the most I can do is report that audio regression testing against RHEL-7.6-20180820.n.0 has been passing. Verifying as SanityOnly.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.