media/pci/cobalt: fix Kconfig and build when SND is not enabled

From: Randy Dunlap <[email protected]>

Fix build errors in cobalt driver when CONFIG_SND is not enabled. Fixes these build errors:

ERROR: "snd_pcm_period_elapsed" [drivers/media/pci/cobalt/cobalt.ko] undefined!
ERROR: "_snd_pcm_stream_lock_irqsave" [drivers/media/pci/cobalt/cobalt.ko] undefined!
ERROR: "snd_pcm_hw_constraint_integer" [drivers/media/pci/cobalt/cobalt.ko] undefined!
ERROR: "snd_pcm_set_ops" [drivers/media/pci/cobalt/cobalt.ko] undefined!
ERROR: "snd_pcm_stream_unlock_irqrestore" [drivers/media/pci/cobalt/cobalt.ko] undefined!
ERROR: "snd_pcm_lib_ioctl" [drivers/media/pci/cobalt/cobalt.ko] undefined!
ERROR: "snd_card_new" [drivers/media/pci/cobalt/cobalt.ko] undefined!
ERROR: "snd_card_free" [drivers/media/pci/cobalt/cobalt.ko] undefined!
ERROR: "snd_card_register" [drivers/media/pci/cobalt/cobalt.ko] undefined!
ERROR: "snd_pcm_new" [drivers/media/pci/cobalt/cobalt.ko] undefined!

---
 drivers/media/pci/cobalt/Kconfig |    1 +
 1 file changed, 1 insertion(+)

@@ -2,6 +2,7 @@ config VIDEO_COBALT
 	tristate "Cisco Cobalt support"
 	depends on VIDEO_V4L2 && I2C && MEDIA_CONTROLLER
 	depends on PCI_MSI && MTD_COMPLEX_MAPPINGS && GPIOLIB
+	depends on SND
 	select I2C_ALGOBIT
 	select VIDEO_ADV7604
 	select VIDEO_ADV7511