Remove unneeded grep in qmp_get_llocal_for_dev function of qmp_functions.sh to optimize.

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

@@ -36,7 +36,7 @@ SOURCE_NETWORK=1
 
 qmp_get_llocal_for_dev() {
   local dev=$1
-  ip a show dev $dev | grep inet6 | awk '{print $2}'
+  ip a show dev $dev | awk '/inet6/{print $2}'
 }