staging: solo6x10: add select SND_PCM to fix build error

This patch fixes a build error when SND_PCM is not set
by adding a select statment.

Signed-off-by: Peter Foley <pefoley2@verizon.net>
Acked-By: Ben Collins <bcollins@bluecherry.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/solo6x10/Kconfig b/drivers/staging/solo6x10/Kconfig
index 2cf77c9..03dcac4 100644
--- a/drivers/staging/solo6x10/Kconfig
+++ b/drivers/staging/solo6x10/Kconfig
@@ -2,6 +2,7 @@
 	tristate "Softlogic 6x10 MPEG codec cards"
 	depends on PCI && VIDEO_DEV && SND && I2C
 	select VIDEOBUF_DMA_SG
+	select SND_PCM
 	---help---
 	  This driver supports the Softlogic based MPEG-4 and h.264 codec
 	  codec cards.