media: i2c: ov4689: Move pixel array size out of struct ov4689_mode

media: i2c: ov4689: Move pixel array size out of struct ov4689_mode

Pixel array dimensions and default crop size do not belong to the
ov4689_mode structure, since they are mode independent. Make them
defines instead.

Signed-off-by: Mikhail Rudenko <mike.rudenko@gmail.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>