V4L/DVB (6196): cx23885: add support for DViCO FusionHDTV 5 Express

This patch adds digital ATSC / QAM support for the DViCO FusionHDTV5 Express.
Remote control is supported by ir-kbd-i2c, RTC is supported by rtc-isl1208.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Steven Toth <stoth@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>