Added snd_config_hook_load_for_all_cards.

Added private_data parameter for snd_config_hooks function.
Fixed the return value mess in the config parser routines.
The include file could begin with 'confdir:' which is replaced with /usr/share/alsa.
The snd_config_search_definitions looks for raw name at first (without suggested root).
Added snd_func_private_card_strtype function.
All configuration files moved to the src/conf directory.
Configuration files modified to use load-on-demand feature using hooks.

src/conf/cards/SI_7018.conf

@@ -0,0 +1,77 @@
+#
+# Configuration for the SI7018 chip
+#
+
+<confdir:pcm/front.conf>
+
+SI_7018.pcm.front.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type hw
+	card $CARD
+	device 0
+}	
+
+<confdir:pcm/rear.conf>
+
+SI_7018.pcm.rear.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+        type hooks
+	slave.pcm {
+		type hw
+		card $CARD
+		device 0
+	}
+	hooks.0 {
+		type ctl_elems
+		hook_args [
+			{
+				name "PCM Playback Volume"
+				preserve true
+				lock true
+				value [ 24 24 ]
+			}
+		]
+	}
+}	
+
+<confdir:pcm/surround40.conf>
+
+SI_7018.pcm.surround40.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type multi
+	slaves [
+		{
+			pcm {
+				@func concat
+				strings [
+					"cards.SI_7018.pcm.front.0:CARD=" $CARD
+				]
+			}
+			channels 2
+		}
+		{
+			pcm {
+				@func concat
+				strings [
+					"cards.SI_7018.pcm.rear.0:CARD=" $CARD
+				]
+			}
+			channels 2
+		}
+	]
+	bindings [
+		{ slave 0 channel 0 }
+		{ slave 0 channel 1 }
+		{ slave 1 channel 0 }
+		{ slave 1 channel 1 }
+	]
+}