trivial: Fix typo in bio_split()'s documentation

Signed-off-by: Alberto Bertogli <albertito@blitiri.com.ar>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/fs/bio.c b/fs/bio.c
index a040cde..e0c9e54 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -1420,8 +1420,7 @@
 }
 
 /*
- * split a bio - only worry about a bio with a single page
- * in it's iovec
+ * split a bio - only worry about a bio with a single page in its iovec
  */
 struct bio_pair *bio_split(struct bio *bi, int first_sectors)
 {