[media] rtl28xxu: use r820t to obtain the signal strength

Now that we can get the strength from r820t, use it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Tested-by: Antti Palosaari <crope@iki.fi>
This commit is contained in:
Mauro Carvalho Chehab 2013-04-07 18:57:15 -03:00
commit 9e30edd890