[media] s5p-fimc: Add color effect control

Add support for V4L2_CID_COLORFX control at the mem-to-mem and capture
video nodes.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>