ARM i.MX mx2_camera: Remove MX2_CAMERA_SWAP16 and MX2_CAMERA_PACK_DIR_MSB flags.

These flags are not used any longer and can be safely removed
since:

| commit 8a76e5383fb5f58868fdd3a2fe1f4b95988f10a8
| Author: Javier Martin <javier.martin@vista-silicon.com>
| Date:   Wed Jul 11 17:34:54 2012 +0200
|
|    media: mx2_camera: Fix mbus format handling

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>