[acl] Remove Ethertype from L3V6 qualifiers (#1433)

This change was already done for MIRRORV6 tables a while back. ETHER_TYPE is unnecessary for V6 tables as the ethertype should always be the same (86DD) for IPv6 traffic. Additionally, this qualifier breaks IPv6 support on some platforms (e.g. Mellanox).

Signed-off-by: Danny Allen <[email protected]>

orchagent/aclorch.cpp

@@ -967,6 +967,12 @@ bool AclRuleL3V6::validateAddMatch(string attr_name, string attr_value)
         return false;
     }
 
+    if (attr_name == MATCH_ETHER_TYPE)
+    {
+        SWSS_LOG_ERROR("Ethertype match is not supported for table type L3V6");
+        return false;
+    }
+
     return AclRule::validateAddMatch(attr_name, attr_value);
 }
 
@@ -1248,7 +1254,7 @@ bool AclTable::create()
         return status == SAI_STATUS_SUCCESS;
     }
 
-    if (type != ACL_TABLE_MIRRORV6)
+    if (type != ACL_TABLE_MIRRORV6 && type != ACL_TABLE_L3V6)
     {
         attr.id = SAI_ACL_TABLE_ATTR_FIELD_ETHER_TYPE;
         attr.value.booldata = true;