This is a cherry pick of the commit from ManageIQ/manageiq-providers-amazon#10 Should have already been in darga-2 http://aws.amazon.com/ec2/instance-types/ updated, so reflecting the changes here.
https://github.com/ManageIQ/manageiq/pull/10903
Verified in 5.7.0.3. I can't verify it in Web UI, so the only thing I could do was to check whether the code has changed.