media: i2c: imx290: Add support for H & V Flips

Backport from https://patchwork.linuxtv.org/project/linux-media/list/?series=9918



The sensor supports H & V flips, so add the relevant hooks for
V4L2_CID_HFLIP and V4L2_CID_VFLIP to configure them.

Note that the Bayer order is maintained as the readout area
shifts by 1 pixel in the appropriate direction (note the
comment about the top margin being 8 pixels whilst the bottom
margin is 9). The V4L2_SEL_TGT_CROP region is therefore
adjusted appropriately.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>