[media] redrat3: enable carrier reports using wideband receiver

The wideband receiver is a little awkward on the redrat3. Data arrives
on a different endpoint, and the learning command must be reissued
every time data is learned.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>