vaapih264enc: force byte-stream if avc isn't supported
vaapih264enc: force byte-stream if avc isn't supported

Removing the validation in gst_vaapiencode_h264_get_caps() since that
ought be handled in gst_vaapiencode_h264_set_config()

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