[media] s5p-mfc: Core support for MFC v7

Adds variant data and core support for the MFC v7 firmware

Signed-off-by: Arun Kumar K <arun.kk@samsung.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>