rpicamsrc: deviceprovider: advertise (M)JPEG as well
rpicamsrc: deviceprovider: advertise (M)JPEG as well

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/682>

GStreamer/gst-plugins-good,GStreamer/gst-plugins-good,GStreamer/gst-plugins-good,GStreamer/gst-plugins-good