nss-ecm: Skip bonding_masters interfaces

`lo` and `bonding_masters` interfaces are not managed by ethtool, so
should be skipped when disabling any interface features.

Signed-off-by: Sean Khan <datapronix@protonmail.com>

qca-nss-ecm/files/disable_offloads.sh

@@ -183,11 +183,11 @@ disable_offload() {
 
   [ -z $1 ] && interface=$(echo /sys/class/net/*) || interface=$*
 
-  for i in $interface; do
+  for iface in $interface; do
-    i=${i##*/}
+    i=${iface##*/}
 
-    # Skip Loopback
+    # Skip Loopback and Bonding Masters
-    if [ $i == lo ]; then
+    if [ $i == lo ] || [ -f $iface ]; then
       continue
     fi