This ATSC/QAM-B demodulator is used by several new devices.

Add support for it. Other patches will fix CodingStyle issues.
Signed-off-by: NFred Richter <frichter@hauppauge.com>
Signed-off-by: NMichael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>