[media] s5p-fimc: Add a platform data entry for MIPI-CSI data alignment

Allow the MIPI-CSI data alignment to be defined in the board setup
as it may be different across various camera sensors.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>