Add driver for the TwinhanDTV StarBox and clones.

Thanks to Ralph Metzler for his initial work on this box and thanks to Twinhan
for their support.
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>