[media] s5p-jpeg: Fix NV12 format entry related to S5C2120 SoC

S5PC210 SoC doesn't support encoding NV12 raw images. Remove
relavant flag from the respective entry in the sjpeg_formats
array.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>