dvbusb: backport newer Realtek devices to vuplus 3.3 kernel.

Contributed by dmarion.

I prepared patch update for RTL2832 driver on vuplus
3.3.8 kernel based on patch which is already in the
repo for etxx00. It brings support for R820T tuner
and some other enhancements.
tuner sensitivity updates
Merge branch 'master' of git://git.code.sf.net/p/openpli/openpli-oe-core