redhat/configs/common/generic: enable vgem module via CONFIG_DRM_VGEM

Alexander Kanavinrequested to merge
alex-kanavin/centos-stream-9:enable-vgem-on-rhel into main

This is a backport of kernel-ark MR: cki-project/kernel-ark!3449 (merged) (please see that for extended rationale).

JIRA: https://issues.redhat.com/browse/RHEL-97628

This is already done on Fedora, but not on RHEL (for reasons I couldn't find out). The module is very useful for virtualized graphics in environments without a physical graphical hardware, as it enables a virtual graphics memory manager, as used by Mesa's software renderer for enhanced performance.

Signed-off-by: Alexander Kanavin alex.kanavin@gmail.com

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