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/pcm/center_lfe.conf

@@ -53,5 +53,6 @@ pcm.!center_lfe {
 			name defaults.namehint.basic
 		}
 		description "Center and Subwoofer speakers"
+		device $DEV
 	}
 }

src/conf/pcm/default.conf

@@ -18,25 +18,40 @@ pcm.!default {
 			}
 		}
 	}
-	# use card-specific definition if exists
-	@func refer
-	name {
-		@func concat
-		strings [
-			"cards."
-			{
-				@func card_driver
+	type empty
+	slave.pcm {
+		# use card-specific definition if exists
+		@func refer
+		name {
+			@func concat
+			strings [
+				"cards."
+				{
+					@func card_driver
+					card $CARD
+				}
+				".pcm.default1:CARD=" $CARD
+			]
+		}
+		default {
+			# use plughw as default
+			type plug
+			slave.pcm {
+				type hw
 				card $CARD
 			}
-			".pcm.default:CARD=" $CARD
-		]
+			hint.device 0
+		}
 	}
-	default {
-		# use plughw as default
-		type plug
-		slave.pcm {
-			type hw
-			card $CARD
+	hint {
+		description "Default Audio Device"
+		device_output {
+			@func refer
+			name defaults.pcm.dmix.device
+		}
+		device_input {
+			@func refer
+			name defaults.pcm.dsnoop.device
 		}
 	}
 }

src/conf/pcm/front.conf

@@ -53,5 +53,6 @@ pcm.!front {
 			name defaults.namehint.basic
 		}
 		description "Front speakers"
+		device $DEV
 	}
 }

src/conf/pcm/iec958.conf

@@ -78,5 +78,6 @@ pcm.!iec958 {
 			name defaults.namehint.basic
 		}
 		description "IEC958 (S/PDIF) Digital Audio Output"
+		device $DEV
 	}
 }

src/conf/pcm/rear.conf

@@ -53,5 +53,6 @@ pcm.!rear {
 			name defaults.namehint.basic
 		}
 		description "Rear speakers"
+		device $DEV
 	}
 }

src/conf/pcm/side.conf

@@ -53,5 +53,6 @@ pcm.!side {
 			name defaults.namehint.basic
 		}
 		description "Side speakers"
+		device $DEV
 	}
 }

src/conf/pcm/surround40.conf

@@ -52,5 +52,8 @@ pcm.!surround40 {
 			]
 		}
 	}
-	hint.description "4.0 Surround output to Front and Rear speakers"
+	hint {
+		description "4.0 Surround output to Front and Rear speakers"
+		device $DEV
+	}
 }

src/conf/pcm/surround41.conf

@@ -59,5 +59,8 @@ pcm.!surround41 {
 	ttable.2.2 1
 	ttable.3.3 1
 	ttable.4.5 1
-	hint.description "4.1 Surround output to Front, Rear and Subwoofer speakers"
+	hint {
+		description "4.1 Surround output to Front, Rear and Subwoofer speakers"
+		device $DEV
+	}
 }

src/conf/pcm/surround50.conf

@@ -59,5 +59,8 @@ pcm.!surround50 {
 	ttable.2.2 1
 	ttable.3.3 1
 	ttable.4.4 1
-	hint.description "5.0 Surround output to Front, Center and Rear speakers"
+	hint {
+		description "5.0 Surround output to Front, Center and Rear speakers"
+		device $DEV
+	}
 }

src/conf/pcm/surround51.conf

@@ -54,5 +54,8 @@ pcm.!surround51 {
 			]
 		}
 	}
-	hint.description "5.1 Surround output to Front, Center, Rear and Subwoofer speakers"
+	hint {
+		description "5.1 Surround output to Front, Center, Rear and Subwoofer speakers"
+		device $DEV
+	}
 }

src/conf/pcm/surround71.conf

@@ -56,5 +56,8 @@ pcm.!surround71 {
 			]
 		}
 	}
-	hint.description "7.1 Surround output to Front, Center, Side, Rear and Woofer speakers"
+	hint {
+		description "7.1 Surround output to Front, Center, Side, Rear and Woofer speakers"
+		device $DEV
+	}
 }