redhat/configs: Enable CONFIG_DRM_VMWGFX on aarch64

Upstream Status: RHEL only.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1992253

We weren't ready to enable it in time for 9.0 beta, but we want to try
enabling it for 9.0 GA.

Signed-off-by: Michel Dänzer mdaenzer@redhat.com