Fix configuration for ICE1724

- Fix surround40 channel numbers
- Fix rear/center_lfe channel assignment

This configuration is based on the channel order on Revo 7.1,
Front/CLFE/Surr/Side

If the other ice1724-based boards have a different order, we need
to rename the driver's id to distinguish the difference.

src/conf/cards/ICE1724.conf

@@ -23,7 +23,7 @@ ICE1724.pcm.rear.0 {
 	type hw
 	card $CARD
 	device 2
-	subdevice 0
+	subdevice 1
 }	
 
 <confdir:pcm/center_lfe.conf>
@@ -36,7 +36,7 @@ ICE1724.pcm.center_lfe.0 {
 	type hw
 	card $CARD
 	device 2
-	subdevice 1
+	subdevice 0
 }	
 
 <confdir:pcm/side.conf>
@@ -65,7 +65,7 @@ ICE1724.pcm.surround40.0 {
 	ttable.2.4 1
 	ttable.3.5 1
 	slave {
-		channels 4
+		channels 6
 		pcm {
 			type hw
 			card $CARD