V4L/DVB (8489): add dvb-t support for terratec cinergy hybrid T usb xs

This patch adds dvbt support for the terratec cinergy hybrid T usb xsstick.
Thanks to Devin Heitmueller and Mauro Chehab for guiding me.

Signed-off-by: Reinhard Schwab <reinhard.schwab@aon.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>