Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/vermagic.h b/include/linux/vermagic.h
index bae807e..9aced11 100644
--- a/include/linux/vermagic.h
+++ b/include/linux/vermagic.h
@@ -9,6 +9,8 @@
 #endif
 #ifdef CONFIG_PREEMPT
 #define MODULE_VERMAGIC_PREEMPT "preempt "
+#elif defined(CONFIG_PREEMPT_RT)
+#define MODULE_VERMAGIC_PREEMPT "preempt_rt "
 #else
 #define MODULE_VERMAGIC_PREEMPT ""
 #endif