[media] v4l: s5p-mfc: Limit enum_fmt to output formats of current version

MFC versions support a different set of formats, this specially applies
to the raw YUV formats. This patch changes enum_fmt, so that it only
reports formats that are supported by the used MFC version.

Signed-off-by: Kamil Debski <k.debski@samsung.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>