f2fs: support f2fs_fiemap

This patch links f2fs_fiemap with generic function with get_block.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 9c80f35..e3ce848 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -715,6 +715,12 @@
 	return err;
 }
 
+int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+		u64 start, u64 len)
+{
+	return generic_block_fiemap(inode, fieinfo, start, len, get_data_block);
+}
+
 static int f2fs_read_data_page(struct file *file, struct page *page)
 {
 	struct inode *inode = page->mapping->host;