V4L/DVB (5813): TUNER_TEA5761 kconfig fixes

The following doesn't make much sense:
drivers/media/video/Kconfig:
...
config TUNER_TEA5761
tristate "TEA 5761 radio tuner (EXPERIMENTAL)"
...
drivers/media/video/Makefile:
...
ifneq ($(CONFIG_TUNER_TEA5761),)
tuner-objs += tea5761.o
endif
...
With this setup, TUNER_TEA5761=m is equivalent to TUNER_TEA5761=y.
This patch therefore changes TUNER_TEA5761 to a bool.
The missing dependency on EXPERIMENTAL the prompt text indicates also
gets added by this patch.
Additionally, the Makefile entry can now be written in a more compact way.

Signed-off-by: Adrian Bunk <[e-mail]>
Signed-off-by: Michael Krufky <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/video/Kconfig

···
 	  If in doubt, say N.
 
 config TUNER_TEA5761
-	tristate "TEA 5761 radio tuner (EXPERIMENTAL)"
+	bool "TEA 5761 radio tuner (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
 	depends on I2C
 	select VIDEO_TUNER
 	help

drivers/media/video/Makefile

···
 tuner-objs	:=	tuner-core.o tuner-types.o tuner-simple.o \
 			mt20xx.o tda8290.o tea5767.o tda9887.o
 
-ifneq ($(CONFIG_TUNER_TEA5761),)
-  tuner-objs += tea5761.o
-endif
+tuner-$(CONFIG_TUNER_TEA5761)	+= tea5761.o
 
 msp3400-objs	:=	msp3400-driver.o msp3400-kthreads.o