Fixed and improved the command used to get the MAC address from a device name

packages/qmp-small-node/files/etc/qmp/qmp_common.sh

@@ -188,7 +188,8 @@ qmp_get_wifi_mac_devices() {
 # Returns the device name that corresponds to the MAC address
 # qmp_get_dev_from_mac 00:22:11:33:44:55
 qmp_get_dev_from_mac() {
-        ip l | grep $1 -i -B1 | grep -v \@ | grep -v ether | awk '{print $2}' | tr -d : | awk NR==1
+        ip link | grep $1 -i -B1 | grep -v \@ | egrep -v "ether|br|mon" | grep mtu | awk '{print $2}' | tr -d : | awk NR==1
+
 }          
 
 qmp_get_mac_for_dev() {