[media] v4l: DocBook: fix media build error

Fix media DocBook build errors by re-adding the orderedlist tag
and putting back the section tags lost during merge.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>