V4L/DVB (10799): Add support for ST STV6110 silicon tuner.

The tuner is used in NetUP Dual DVB-S2 CI card.
http://linuxtv.org/wiki/index.php/NetUP_Dual_DVB_S2_CI



Signed-off-by: Igor M. Liplianin <liplianin@netup.ru>
[mchehab@redhat.com: removed a wrong header: "cx23885.h"]
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>