Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/pci/switch/Kconfig b/drivers/pci/switch/Kconfig
index aee28a5..d370f4c 100644
--- a/drivers/pci/switch/Kconfig
+++ b/drivers/pci/switch/Kconfig
@@ -9,7 +9,7 @@
 	 Enables support for the management interface for the MicroSemi
 	 Switchtec series of PCIe switches. Supports userspace access
 	 to submit MRPC commands to the switch via /dev/switchtecX
-	 devices. See <file:Documentation/switchtec.txt> for more
+	 devices. See <file:Documentation/driver-api/switchtec.rst> for more
 	 information.
 
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