media: s5p-mfc: Add YV12 and I420 multiplanar format support

YV12 and I420 format (3-plane) support is added. Stride information is
added to all formats and planes since it is necessary for YV12/I420
which are different from width.

Cc: linux-fsd@tesla.com
Signed-off-by: Smitha T Murthy <smithatmurthy@gmail.com>
Signed-off-by: Aakarsh Jain <aakarsh.jain@samsung.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

media: s5p-mfc: Add initial support for MFCv12

Add support for MFCv12, with a new register file and necessary hw
control, decoder, encoder and structural changes. Add luma dbp, chroma
dpb and mv sizes for each codec as per the UM for MFCv12, along with
appropriate alignment.

Cc: linux-fsd@tesla.com
Signed-off-by: Smitha T Murthy <smithatmurthy@gmail.com>
Signed-off-by: Aakarsh Jain <aakarsh.jain@samsung.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>