Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/Documentation/media/kapi/v4l2-device.rst b/Documentation/media/kapi/v4l2-device.rst
index 6c58bbb..5e25bf1 100644
--- a/Documentation/media/kapi/v4l2-device.rst
+++ b/Documentation/media/kapi/v4l2-device.rst
@@ -1,3 +1,5 @@
+.. SPDX-License-Identifier: GPL-2.0
+
 V4L2 device instance
 --------------------
 
@@ -91,7 +93,7 @@
 		int err;
 
 		/* Find driver 'ivtv' on the PCI bus.
-		pci_bus_type is a global. For USB busses use usb_bus_type. */
+		pci_bus_type is a global. For USB buses use usb_bus_type. */
 		drv = driver_find("ivtv", &pci_bus_type);
 		/* iterate over all ivtv device instances */
 		err = driver_for_each_device(drv, NULL, p, callback);