media: microchip-csi2dc: Remove VC support for now

As part of removing mbus config flags, remove VC flag use in the
microchip-csi2dc driver. The support can be reintroduced later on as part
of the streams patches.

[mchehab: patch accepted by Eugen:  https://lore.kernel.org/linux-media/c0676a4e-803f-9f1c-542b-4b007705ef3d@microchip.com/

, so add an accepted-by tag]
Accepted-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>