V4L/DVB (7673): cx23885: Add support for the Hauppauge HVR1400

DVB-T mode is now supported using the DiBcom dib7000p demodulator
and the Xceive xc3028L silicon tuner. Analog mode is not supported.

Signed-off-by: Steven Toth <stoth@hauppauge.com>
Reviewed-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>