[media] r820t: avoid rewrite all regs when not needed

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Tested-by: Antti Palosaari <crope@iki.fi>
This commit is contained in:
Mauro Carvalho Chehab 2013-04-11 13:22:21 -03:00
commit 4176e7ea88