ALSA: ALSA driver for SGI HAL2 audio device

This patch adds a new ALSA driver for the audio device found inside
many older SGI workstation (Indy, Indigo2). The hardware uses a SGI
custom chip, which feeds two codec chips, an IEC chip and a synth chip.
Currently only one of the codecs is supported. This driver already has
the same functionality as the HAL2 OSS driver and will replace it.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/mips/Kconfig b/sound/mips/Kconfig
index bb26f6c..2a61cad 100644
--- a/sound/mips/Kconfig
+++ b/sound/mips/Kconfig
@@ -9,6 +9,13 @@
 
 if SND_MIPS
 
+config SND_SGI_HAL2
+        tristate "SGI HAL2 Audio"
+        depends on SGI_HAS_HAL2
+        help
+                Sound support for the SGI Indy and Indigo2 Workstation.
+
+
 config SND_AU1X00
 	tristate "Au1x00 AC97 Port Driver"
 	depends on SOC_AU1000 || SOC_AU1100 || SOC_AU1500