Fix endianess of PMac driver

Fix endianess of PMac driver for the latest change of dmix.
Now need to specify the (big-endian) format explicitly.

src/conf/cards/PMacToonie.conf

@@ -21,23 +21,19 @@ PMacToonie.pcm.front.0 {
 	}
 }	
 
-# once when dmix is confirmed to work on ppc, we should enable dmix/dsnoop
-# for default, too
-
+# default with dmix+softvol & dsnoop
 PMacToonie.pcm.default {
 	@args [ CARD ]
 	@args.CARD {
 		type string
 	}
 	type asym
-	playback.pcm {
 		type plug
 		slave.pcm {
 			type softvol
 			slave.pcm {
-				type hw
-				card $CARD
-				device 0
+				@func concat
+				strings [ "dmix:CARD=" $CARD ",FORMAT=S16" ]
 			}
 			control {
 				name "PCM Playback Volume"
@@ -48,9 +44,8 @@ PMacToonie.pcm.default {
 	capture.pcm {
 		type plug
 		slave.pcm {
-			type hw
-			card $CARD
-			device 0
+			@func concat
+			strings [ "dsnoop:CARD=" $CARD ",FORMAT=S16" ]
 		}
 	}
 }