[ALSA] add Asus Xonar driver

Add the snd-virtuoso driver for the Asus Virtuoso 200 chip used on the
PCI and PCI-E models of the Xonar sound card.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
index d3be87d..5baee6b 100644
--- a/sound/pci/Kconfig
+++ b/sound/pci/Kconfig
@@ -885,6 +885,17 @@
 	  To compile this driver as a module, choose M here: the module
 	  will be called snd-via82xx-modem.
 
+config SND_VIRTUOSO
+	tristate "Asus Virtuoso 200 (Xonar)"
+	depends on SND
+	select SND_OXYGEN_LIB
+	help
+	  Say Y here to include support for sound cards based on the
+	  Asus AV200 chip, i.e., Xonar D2 and Xonar D2X.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-virtuoso.
+
 config SND_VX222
 	tristate "Digigram VX222"
 	depends on SND