[media] vidioc-enumstd.rst: fix a broken reference

Somehow, the conversion broke a reference here. Re-add it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2016-08-15 13:05:05 -03:00
commit edec4f446d