video-format: Add the missing P012_LE into GST_VAAPI_FORMATS_ALL.
video-format: Add the missing P012_LE into GST_VAAPI_FORMATS_ALL.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/-/merge_requests/373>

GStreamer/gstreamer-vaapi,ceyusa/gstreamer-vaapi,ceyusa/gstreamer-vaapi,GStreamer/gstreamer-vaapi