[Feature]Merge MP1_MR1 from MTK

Change-Id: I3fc364555acf14f1c308b6be7b05f21f92757fd0
diff --git a/src/kernel/linux/v4.19/include/net/ra_nat.h b/src/kernel/linux/v4.19/include/net/ra_nat.h
old mode 100644
new mode 100755
index 5963011..189e119
--- a/src/kernel/linux/v4.19/include/net/ra_nat.h
+++ b/src/kernel/linux/v4.19/include/net/ra_nat.h
@@ -544,5 +544,8 @@
 #define QDMA_RX		5
 #define PDMA_RX		0
 
+#if defined(CONFIG_HW_NAT)
+void mtk_hook_fast_path(struct net_device *dev);
+#endif
 
 #endif