media: i2c: st-mipid02: remove parallel mbus format on sink pad

2X.. mbus formats are related to parallel interface and
as such should not be acceptable on the sink pad of the bridge.
Only keep their csi counterpart in 1X..

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>