ALSA: bebob: Add support for Yamaha GO series

This commit allows this driver to support all of models which Yamaha produced
with DM1000/BeBoB. They are:
 - GO44
 - GO46

This commit adds Yamaha specific operations. To get source of clock, AV/C Audio
Subunit command is used.

I note that their appearances are similar to some models of TerraTec; 'Go44' is
similar to 'PHASE 24 FW' and 'GO46' is similar to 'PHASE X24 FW'. But their
combination of Audio/Music subunits is a bit different.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/firewire/Kconfig b/sound/firewire/Kconfig
index b1a1d7d8..f8e4845 100644
--- a/sound/firewire/Kconfig
+++ b/sound/firewire/Kconfig
@@ -111,6 +111,7 @@
 	  * TerraTec PHASE 24 FW/PHASE X24 FW/PHASE 88 Rack FW
 	  * Terratec EWS MIC2/EWS MIC4
 	  * Terratec Aureon 7.1 Firewire
+	  * Yamaha GO44/GO46
 
           To compile this driver as a module, choose M here: the module
           will be called snd-bebob.