f2fs: clean up codes with {f2fs_,}data_blkaddr()

- rename datablock_addr() to data_blkaddr().
- wrap data_blkaddr() with f2fs_data_blkaddr() to clean up
parameters.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 6006802..cc26467 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -805,8 +805,7 @@ int f2fs_get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
 	dn->nid = nids[level];
 	dn->ofs_in_node = offset[level];
 	dn->node_page = npage[level];
-	dn->data_blkaddr = datablock_addr(dn->inode,
-				dn->node_page, dn->ofs_in_node);
+	dn->data_blkaddr = f2fs_data_blkaddr(dn);
 	return 0;
 
 release_pages: