Change line/channel names from tapi/1 and tapi/2 to tapi/0 and tapi1

Unsupported lines/channes like TAPI/[2-6], BRCM/6 are also removed.

This change has the following benefits.
- To simplify the line/channel name handling in /etc/init.d/voice_client
- To have the consistent implementation both on Intel and on Broadcom platforms

voice-client/files/etc/init.d/voice_client

@@ -263,9 +263,7 @@ read_codecs_ptime()
 #
 read_lines()
 {
-	local line call_lines lineid ldx lines llength clength
-	local loffset=$(ubus -t 1 call voice.asterisk platform | jsonfilter -e @.lineoffset)
-	loffset=${loffset:-0}
+	local line call_lines lines clength
 
 	config_get call_lines $1 call_lines
 
@@ -274,28 +272,17 @@ read_lines()
 		# convert line format to <LINENAME><LINEID>
 		case $line in
 			[0-9])
-				line="$LINENAME$line"
 			;;
 			"$CHANNELNAME"/[0-9])
+				# get the index from channel name
 				clength=$(echo $CHANNELNAME | wc -c)
-				line="$LINENAME${line:$clength}"
+				line="${line:$clength}"
 			;;
 		esac
 
-		# get the index from line name
-		# llength=$(echo $LINENAME | wc -c)
-		# lineid="${lineid:$llength}"
+		[ -n "$line" ] || continue
 
-		# get the index from uci config order
-		lineid="$(uci show voice_client | grep =tel_line | grep -wn $line | cut -d ':' -f1)"
-
-		[ -n "$lineid" ] || continue
-
-		# -1 to match the line's uci config index number
-		# +loffset to match the correct number in channel driver
-		ldx=$((lineid-1+loffset))
-
-		lines="$lines$CHANNELNAME/$ldx&"
+		lines="$lines$CHANNELNAME/$line&"
 	done
 
 	lines=$(escape_sed_substitution $lines)

voice-client/files/lib/voice/broadcom.sh

@@ -22,7 +22,7 @@ getBaseMAC() {
 }
 
 getAllLines() {
-    echo "BRCM/0&BRCM/1&BRCM/2&BRCM/3&BRCM/4&BRCM/5&BRCM/6"
+    echo "BRCM/0&BRCM/1&BRCM/2&BRCM/3&BRCM/4&BRCM/5"
 }
 
 getLineIdx() {

voice-client/files/lib/voice/intel.sh

@@ -28,12 +28,11 @@ getBaseMAC() {
 }
 
 getAllLines() {
-    echo "TAPI/1&TAPI/2&TAPI/3&TAPI/4&TAPI/5&TAPI/6"
+    echo "TAPI/0&TAPI/1"
 }
 
 getLineIdx() {
-    i=$1
-    echo $((i+1))
+    echo $1
 }
 
 getEchoCancellingValue() {

voice-client/files/usr/libexec/rpcd/voice.asterisk

@@ -137,8 +137,8 @@ case "$1" in
 					    json_add_int chanoffset 0
 				    ;;
 				    "tapi")
-					    json_add_int lineoffset 1
-					    json_add_int chanoffset -1
+					    json_add_int lineoffset 0
+					    json_add_int chanoffset 0
 				    ;;
 			        *)
 				    # Error, unknown platform