Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/tee/Kconfig b/drivers/tee/Kconfig
index a6df12d..676ffcb 100644
--- a/drivers/tee/Kconfig
+++ b/drivers/tee/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 # Generic Trusted Execution Environment Configuration
 config TEE
 	tristate "Trusted Execution Environment support"