netifd: use the new json_get_vars function in the dhcp helper script

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31727 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/netifd/files/lib/netifd/proto/dhcp.sh

@@ -18,12 +18,7 @@ proto_dhcp_setup() {
 	local config="$1"
 	local iface="$2"
 
-	json_get_var ipaddr ipaddr
-	json_get_var hostname hostname
-	json_get_var clientid clientid
-	json_get_var vendorid vendorid
-	json_get_var broadcast broadcast
-	json_get_var reqopts reqopts
+	json_get_vars ipaddr hostname clientid vendorid broadcast reqopts
 
 	local opt dhcpopts
 	for opt in $reqopts; do