media: dvb_vb2: Use the sanitized value after processed by VB2 core

if the number of buffers requested by the user is too big, the
VB core will truncate to a valid value.

Use it, instead of what the user requested.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Mauro Carvalho Chehab 2017-12-28 09:03:21 -05:00
commit 19393a0357