V4L/DVB (6960): tda18271: add support for NXP TDA18271HD/C2

Tested successfully with QAM256 digital cable.
Analog television is limping, needs more work.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
4 files changed