added support for different tda10046 firmware versions.  tested with v20, v21
and v25.  (Andreas Oberritter)
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>