Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/net/bridge/Kconfig b/net/bridge/Kconfig
index aa0d3b2..e4fb050 100644
--- a/net/bridge/Kconfig
+++ b/net/bridge/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # 802.1d Ethernet Bridging
 #
@@ -17,7 +18,7 @@
 	  other third party bridge products.
 
 	  In order to use the Ethernet bridge, you'll need the bridge
-	  configuration tools; see <file:Documentation/networking/bridge.txt>
+	  configuration tools; see <file:Documentation/networking/bridge.rst>
 	  for location. Please read the Bridge mini-HOWTO for more
 	  information.