[ALSA] Add ARM PXA2xx AC97 driver

Documentation,ARM,/arm/Makefile,ARM PXA2XX driver
Added ARM PXA2xx AC97 driver by Nicolas Pitre
(moved from alsa-driver tree).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/arm/Kconfig b/sound/arm/Kconfig
index 34c1740..2e4a5e0 100644
--- a/sound/arm/Kconfig
+++ b/sound/arm/Kconfig
@@ -20,5 +20,17 @@
 	select SND_PCM
 	select SND_AC97_CODEC
 
-endmenu
+config SND_PXA2XX_PCM
+	tristate
+	select SND_PCM
 
+config SND_PXA2XX_AC97
+	tristate "AC97 driver for the Intel PXA2xx chip"
+	depends on ARCH_PXA && SND
+	select SND_PXA2XX_PCM
+	select SND_AC97_CODEC
+	help
+	  Say Y or M if you want to support any AC97 codec attached to
+	  the PXA2xx AC97 interface.
+
+endmenu