Backport of "vaapipluginutil: Use GST_VAAPI_DISPLAY_TYPE_DRM for Mesa3D GBM" into 1.16
Backport of !319 (merged) "vaapipluginutil: Use GST_VAAPI_DISPLAY_TYPE_DRM for Mesa3D GBM".
Commits:
- 336c2b76 vaapipluginutil: Use GST_VAAPI_DISPLAY_TYPE_DRM for Mesa3D GBM