[patch, -git] media/video/sound build fix, TEA5761/TEA5767

[Ingo Molnar <mingo@elte.hu>]

x86.git randconfig testing found the following new build error in latest 
-git:

 drivers/built-in.o: In function `v4l2_i2c_drv_attach_legacy':
 tuner-core.c:(.text+0x1a829d): undefined reference to `v4l2_i2c_attach'
 drivers/built-in.o: In function `tuner_command':
 tuner-core.c:(.text+0x1a971c): undefined reference to `v4l_printk_ioctl'

the reason appears to be that the TEA5761/TEA5767 tuner code is 
dependent on (legacy?) V4L infrastructure like v4l2_i2c_attach, by 
virtue of drivers/media/video/tuner-core.c including 
media/v4l2-i2c-drv-legacy.h and ./sound/i2c/other/Makefile doing:

  snd-tea575x-tuner-objs := tea575x-tuner.o

for now i solved this via adding a VIDEO_V4L2_COMMON dependency to 
MEDIA_TUNER - which solves the build problem by excluding these drivers 
- but i suspect there might be a better fix as well that does not 
restrict the selectability of these drivers.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 drivers/media/common/tuners/Kconfig |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux/drivers/media/common/tuners/Kconfig
===================================================================
--- linux.orig/drivers/media/common/tuners/Kconfig
+++ linux/drivers/media/common/tuners/Kconfig
@@ -20,7 +20,7 @@ config MEDIA_ATTACH
 config MEDIA_TUNER
 	tristate
 	default DVB_CORE || VIDEO_DEV
-	depends on DVB_CORE || VIDEO_DEV
+	depends on (DVB_CORE || VIDEO_DEV) && VIDEO_V4L2_COMMON
 	select MEDIA_TUNER_XC2028 if !MEDIA_TUNER_CUSTOMIZE
 	select MEDIA_TUNER_XC5000 if !MEDIA_TUNER_CUSTOMIZE
 	select MEDIA_TUNER_MT20XX if !MEDIA_TUNER_CUSTOMIZE