xfs: fix various typos

Signed-off-by: Malcolm Parsons <malcolm.parsons@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/fs/xfs/xfs_utils.c b/fs/xfs/xfs_utils.c
index fcc2285..79b9e5e 100644
--- a/fs/xfs/xfs_utils.c
+++ b/fs/xfs/xfs_utils.c
@@ -374,7 +374,7 @@
 
 	/*
 	 * Follow the normal truncate locking protocol.  Since we
-	 * hold the inode in the transaction, we know that it's number
+	 * hold the inode in the transaction, we know that its number
 	 * of references will stay constant.
 	 */
 	xfs_ilock(ip, XFS_ILOCK_EXCL);