[ALSA] fm801 - Fix kconfig dependency mess of fm801-tea575x

FM801-tea575x tuner has a reverse selection to V4L1 and this causes
nasty dependency problems.

The patch simplifies the dependency with a normal
"depends on VIDEO_V4L1".  This decreases the usability but fixes bugs,
yeah.  If any better feature like "requires" is introduced to kbuild
in future, we'll be able to switch it...

Signed-off-by: Takashi Iwai <tiwai@suse.de>