media: ov5640: Program the visible resolution

The active frame size is set in the initialization arrays, but the value
itself is also available in the struct ov5640_mode_info.

Let's move these values out of the big bytes arrays, and program it with
the value of the mode that we are given.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>