[PATCH] dvb: remove noisy debug print

comment out noisy dprintk in dst_get_signal() (why are errors only visible
with debug on?  this needs to be cleaned up so we can disable debug by
default)

Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>