vfs: Rename end_writeback() to clear_inode()

After we moved inode_sync_wait() from end_writeback() it doesn't make sense
to call the function end_writeback() anymore. Rename it to clear_inode()
which well says what the function really does - set I_CLEAR flag.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index e23dc7c..9870417 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -174,7 +174,7 @@
 
 	truncate_inode_pages(&inode->i_data, 0);
 	invalidate_inode_buffers(inode);
-	end_writeback(inode);
+	clear_inode(inode);
 
 	if (inode->i_nlink)
 		return;