[PATCH] dvb: ttpci: fix timeout handling to be save with PREEMPT

Timeout handling fixed, especially for preemtible kernels and/or high system
load.

Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>