Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py
index 6e0b0af..4136dc2 100644
--- a/scripts/gdb/vmlinux-gdb.py
+++ b/scripts/gdb/vmlinux-gdb.py
@@ -27,7 +27,13 @@
     import linux.modules
     import linux.dmesg
     import linux.tasks
+    import linux.config
     import linux.cpus
     import linux.lists
+    import linux.rbtree
     import linux.proc
     import linux.constants
+    import linux.timerlist
+    import linux.clk
+    import linux.genpd
+    import linux.device