[PATCH] dvb: nxt200x: Add function for nxt200x to change pll input

- Added function for nxt200x to change pll input
- For VSB set to input 0, for QAM set to input 1
- will only be set for cards that have set_pll_input defined

Signed-off-by: Kirk Lapray <kirk.lapray@gmail.com>
Signed-off-by: Michael Krufky <mkrufky@m1k.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>