[media] dw2102: corrections for TeVii s660 LNB power control

There are two TeVii s660 modifications with different LNB power control
implementations. It is safe to call both methods for each card.

Signed-off-by: Igor M. Liplianin <liplianin@me.by>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>