Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/rapidio/Kconfig b/drivers/rapidio/Kconfig
index d6d2f20..677d1af 100644
--- a/drivers/rapidio/Kconfig
+++ b/drivers/rapidio/Kconfig
@@ -1,6 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # RapidIO configuration
 #
+
+config HAVE_RAPIDIO
+	bool
+
+menuconfig RAPIDIO
+	tristate "RapidIO support"
+	depends on HAVE_RAPIDIO || PCI
+	help
+	  If you say Y here, the kernel will include drivers and
+	  infrastructure code to support RapidIO interconnect devices.
+
 source "drivers/rapidio/devices/Kconfig"
 
 config RAPIDIO_DISC_TIMEOUT
@@ -74,7 +86,7 @@
 	  This option includes RapidIO channelized messaging driver which
 	  provides socket-like interface to allow sharing of single RapidIO
 	  messaging mailbox between multiple user-space applications.
-	  See "Documentation/rapidio/rio_cm.txt" for driver description.
+	  See "Documentation/driver-api/rapidio/rio_cm.rst" for driver description.
 
 config RAPIDIO_MPORT_CDEV
 	tristate "RapidIO /dev mport device driver"