ALSA: Add ALSA driver for Atmel AC97 controller

This patch adds ALSA support for the AC97 controller found on Atmel
AVR32 devices.

Tested on ATSTK1006 + ATSTK1000 with a development board with a AC97
codec.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/atmel/Kconfig b/sound/atmel/Kconfig
index 715318e..6c228a9 100644
--- a/sound/atmel/Kconfig
+++ b/sound/atmel/Kconfig
@@ -8,4 +8,12 @@
 	help
 	  ALSA sound driver for the Atmel Audio Bitstream DAC (ABDAC).
 
+config SND_ATMEL_AC97C
+	tristate "Atmel AC97 Controller (AC97C) driver"
+	select SND_PCM
+	select SND_AC97_CODEC
+	depends on DW_DMAC && AVR32
+	help
+	  ALSA sound driver for the Atmel AC97 controller.
+
 endmenu