ext4: fix misspellings in comments.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/ext4/migrate.c b/fs/ext4/migrate.c
index a465189..364ea4d 100644
--- a/fs/ext4/migrate.c
+++ b/fs/ext4/migrate.c
@@ -361,7 +361,7 @@
 	 * blocks.
 	 *
 	 * While converting to extents we need not
-	 * update the orignal inode i_blocks for extent blocks
+	 * update the original inode i_blocks for extent blocks
 	 * via quota APIs. The quota update happened via tmp_inode already.
 	 */
 	spin_lock(&inode->i_lock);