f2fs: avoid unneeded SetPageUptodate in f2fs_write_end

We have already set page update in ->write_begin, so we should remove redundant
SetPageUptodate in ->write_end.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/data.c

@@ -1016,7 +1016,6 @@ static int f2fs_write_end(struct file *file,
 
 	trace_f2fs_write_end(inode, pos, len, copied);
 
-	SetPageUptodate(page);
 	set_page_dirty(page);
 
 	if (pos + copied > i_size_read(inode)) {