linux-phytec-ti

media: document the reservedX fields in media_v2_topology

The MEDIA_IOC_G_TOPOLOGY documentation didn't document the reservedX
fields. Related to that was that the documented type of the num_* fields
was also wrong.

Fix both.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>