Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/uapi/linux/neighbour.h b/include/uapi/linux/neighbour.h
index 904db61..cd144e3 100644
--- a/include/uapi/linux/neighbour.h
+++ b/include/uapi/linux/neighbour.h
@@ -28,6 +28,7 @@
 	NDA_MASTER,
 	NDA_LINK_NETNSID,
 	NDA_SRC_VNI,
+	NDA_PROTOCOL,  /* Originator of entry */
 	__NDA_MAX
 };
 
@@ -43,6 +44,7 @@
 #define NTF_PROXY	0x08	/* == ATF_PUBL */
 #define NTF_EXT_LEARNED	0x10
 #define NTF_OFFLOADED   0x20
+#define NTF_STICKY	0x40
 #define NTF_ROUTER	0x80
 
 /*