drm/panic: Add ABGR2101010 support

Add support for ABGR2101010, used by the nouveau driver.

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241022185553.1103384-2-jfalempe@redhat.com