V4L/DVB (5444): Saa7134-dvb fix sleep function of the fmd1216 tuner.

Static locals should not be changed - the original contents gets lost.
Thanks to Trent Piepho for pointing me to this.

Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>