V4L/DVB (5740): Git-dvb: fix the tea5761 tuner support

Due to a typo the tea5761 tuner support was dead code.
This patch also fixes a bug in the no longer dead code:
A void function can't return anything.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>