[media] s3c-camif: Remove use of deprecated V4L2_CTRL_FLAG_DISABLED

I came across this while checking the kernel use of V4L2_CTRL_FLAG_DISABLED.

This flag should not be used with the control framework. Instead, just don't
add the control at all.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>