ALSA: firewire-tascam: add hwdep interface

This commit adds hwdep interface so as the other IEEE 1394 sound devices
has.

This interface is designed for mixer/control applications. By using this
interface, an application can get information about firewire node, can
lock/unlock kernel streaming and can get notification at starting/stopping
kernel streaming.

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 bb3f261..bee0e5f 100644
--- a/sound/firewire/Kconfig
+++ b/sound/firewire/Kconfig
@@ -138,6 +138,7 @@
 config SND_FIREWIRE_TASCAM
 	tristate "TASCAM FireWire series support"
 	select SND_FIREWIRE_LIB
+	select SND_HWDEP
 	help
 	 Say Y here to include support for TASCAM.
 	  * FW-1884