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

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/romfs/mmap-nommu.c b/fs/romfs/mmap-nommu.c
index f373bde..ea06c75 100644
--- a/fs/romfs/mmap-nommu.c
+++ b/fs/romfs/mmap-nommu.c
@@ -72,8 +72,8 @@
 
 const struct file_operations romfs_ro_fops = {
 	.llseek			= generic_file_llseek,
-	.read			= do_sync_read,
-	.aio_read		= generic_file_aio_read,
+	.read			= new_sync_read,
+	.read_iter		= generic_file_read_iter,
 	.splice_read		= generic_file_splice_read,
 	.mmap			= romfs_mmap,
 	.get_unmapped_area	= romfs_get_unmapped_area,