[media] V4L: DocBook: Add V4L2_MBUS_FMT_YUV10_1X30 media bus pixel code

This patch adds definition of media bus code for YUV pixel format
transferred in 30-bit samples where each component has 10 bits width.

[mchehab@redhat.com: fix a merge conflict at v4l2-mediabus.h]
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>