Make dsnoop card-specific

Make dsnoop card-specific.  Its definition is moved to pcm/dsnoop.conf.

src/conf/alsa.conf

@@ -186,30 +186,6 @@ pcm.plug {
 	slave.pcm $SLAVE
 }
 
-pcm.dsnoop {
-	@args [ SLAVE FORMAT RATE ]
-	@args.SLAVE {
-		type string
-		default "hw:0,0"
-	}
-	@args.FORMAT {
-		type string
-		default S16_LE
-	}
-	@args.RATE {
-		type integer
-		default 48000
-	}
-	type dsnoop
-	ipc_key 5778293
-	ipc_key_add_uid yes
-	slave {
-		pcm $SLAVE
-		format $FORMAT
-		rate $RATE
-	}
-}
-
 pcm.shm {
 	@args [ SOCKET PCM ]
 	@args.SOCKET {
@@ -278,6 +254,7 @@ pcm.modem cards.pcm.modem
 
 pcm.default cards.pcm.default
 pcm.dmix cards.pcm.dmix
+pcm.dsnoop cards.pcm.dsnoop
 
 #
 #  Control interface