Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/x86/xen/debugfs.c b/arch/x86/xen/debugfs.c
index 13da879..5324109 100644
--- a/arch/x86/xen/debugfs.c
+++ b/arch/x86/xen/debugfs.c
@@ -9,13 +9,8 @@
 
 struct dentry * __init xen_init_debugfs(void)
 {
-	if (!d_xen_debug) {
+	if (!d_xen_debug)
 		d_xen_debug = debugfs_create_dir("xen", NULL);
-
-		if (!d_xen_debug)
-			pr_warning("Could not create 'xen' debugfs directory\n");
-	}
-
 	return d_xen_debug;
 }