media: imx: imx7-mipi-csis: Expose correct YUV formats

The imx7-mipi-csis driver claims to support MEDIA_BUS_FMT_VYUY8_2X8 and
MEDIA_BUS_FMT_YUYV8_2X8, but this is not correct. When receiving
YUV 4:2:2 data on the CSI-2 bus, the output format is
MEDIA_BUS_FMT_UYVY8_2X8. Fix this.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>