media: v4l: Fix documentation for 12-bit packed Bayer

Fix documentation for R13 and R33 low bits.
Signed-off-by: Suhrid Subramaniam <suhrid.subramaniam@mediatek.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Documentation/userspace-api/media/v4l/pixfmt-srggb12p.rst

@@ -60,7 +60,7 @@ Each cell is one byte.
           G\ :sub:`10low`\ (bits 3--0)
        -  G\ :sub:`12high`
        -  R\ :sub:`13high`
-       -  R\ :sub:`13low`\ (bits 3--2)
+       -  R\ :sub:`13low`\ (bits 7--4)
 
           G\ :sub:`12low`\ (bits 3--0)
     -  -  start + 12:
@@ -82,6 +82,6 @@ Each cell is one byte.
           G\ :sub:`30low`\ (bits 3--0)
        -  G\ :sub:`32high`
        -  R\ :sub:`33high`
-       -  R\ :sub:`33low`\ (bits 3--2)
+       -  R\ :sub:`33low`\ (bits 7--4)
 
           G\ :sub:`32low`\ (bits 3--0)