switch simple generic_file_aio_read() users to ->read_iter()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 794da94..a5d8299 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -152,8 +152,8 @@
 	.open		= jfs_open,
 	.llseek		= generic_file_llseek,
 	.write		= do_sync_write,
-	.read		= do_sync_read,
-	.aio_read	= generic_file_aio_read,
+	.read		= new_sync_read,
+	.read_iter	= generic_file_read_iter,
 	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
 	.splice_read	= generic_file_splice_read,