pcm config files cleanups and name hint extension

- remove device 0/subdevice 0 from configuration files (it's default)
- name_hint
  - fixed parsing slaves
  - obtain device numbers directly from 'type hw' configurations to
    avoid poluting of configurations scripts with hint.device lines

src/conf/cards/HDA-Intel.conf

@@ -13,13 +13,11 @@ HDA-Intel.pcm.front.0 {
 	slave.pcm {
 		type hw
 		card $CARD
-		device 0
 	}
 	control {
 		name "PCM Playback Volume"
 		card $CARD
 	}
-	hint.device 0
 }	
 
 # default with dmix+softvol & dsnoop
@@ -50,16 +48,6 @@ HDA-Intel.pcm.default {
 			strings [ "dsnoop:" $CARD ]
 		}
 	}
-	hint {
-		device_output {
-			@func refer
-			name defaults.pcm.dmix.device
-		}
-		device_input {
-			@func refer
-			name defaults.pcm.dsnoop.device
-		}
-	}
 }
 
 <confdir:pcm/surround40.conf>