media: doc-rst: add IPU3 raw10 bayer pixel format definitions

The formats added by this patch are:

    V4L2_PIX_FMT_IPU3_SBGGR10
    V4L2_PIX_FMT_IPU3_SGBRG10
    V4L2_PIX_FMT_IPU3_SGRBG10
    V4L2_PIX_FMT_IPU3_SRGGB10

Signed-off-by: Hyungwoo Yang <hyungwoo.yang@intel.com>
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>