minigbm: Add MTL PCI-IDs

1) Adding MTL PCI-IDs to minigbm
2) renamed gen variable to graphics_version to allign to driver naming
convention and to adapt to upcoming split ip versions for
display/graphics/media.

BUG=b:243459433, b:243685631
TEST=emerge-rex minigbm

Change-Id: I9859fadecf737532e8f1689c1531caccf31fe212
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/3841636
Tested-by: Ashutosh Kumar <ashutosh1.kumar@intel.com>
Reviewed-by: Dominik Behr <dbehr@chromium.org>
Commit-Queue: Rajat Jain <rajatja@google.com>
1 file changed