Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/macintosh/ans-lcd.c b/drivers/macintosh/ans-lcd.c
index c8e078b..400960c 100644
--- a/drivers/macintosh/ans-lcd.c
+++ b/drivers/macintosh/ans-lcd.c
@@ -64,7 +64,7 @@
 	printk(KERN_DEBUG "LCD: write\n");
 #endif
 
-	if (!access_ok(VERIFY_READ, buf, count))
+	if (!access_ok(buf, count))
 		return -EFAULT;
 
 	mutex_lock(&anslcd_mutex);
@@ -160,7 +160,7 @@
 	struct device_node* node;
 
 	node = of_find_node_by_name(NULL, "lcd");
-	if (!node || !node->parent || strcmp(node->parent->name, "gc")) {
+	if (!node || !of_node_name_eq(node->parent, "gc")) {
 		of_node_put(node);
 		return -ENODEV;
 	}