Typos: change aditional to additional.

The below patch fixes some typos "aditional" to "additional", and also fixes
a comment with another word mispelled.

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
index 8b9a774..951442a 100644
--- a/drivers/hwmon/tmp401.c
+++ b/drivers/hwmon/tmp401.c
@@ -624,7 +624,7 @@
 			goto exit_remove;
 	}
 
-	/* Register aditional tmp411 sysfs hooks */
+	/* Register additional tmp411 sysfs hooks */
 	if (data->kind == tmp411) {
 		for (i = 0; i < ARRAY_SIZE(tmp411_attr); i++) {
 			err = device_create_file(&client->dev,