[media] ca-get-descr-info.rst: add doc for for struct ca_descr_info

The documentation follows what's there at the ca.h header.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2016-08-31 14:07:38 -03:00
commit 302397d003