There was a drm/drm_mode.h included added recently, drm/ is usually referencing the linux kernel header, but we only requires the libdrm headers to be installed. On top of this, including drm_mode.h is never needed as its already included by drm.h. Fixes #1596 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3452>