Cleanup out-or-tree building for some boards (.depend)

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/tqc/tqm5200/Makefile b/board/tqc/tqm5200/Makefile
index a5ce7bd..ce125e2 100644
--- a/board/tqc/tqm5200/Makefile
+++ b/board/tqc/tqm5200/Makefile
@@ -38,7 +38,7 @@
 	rm -f $(SOBJS) $(OBJS)
 
 distclean:	clean
-	rm -f $(LIB) core *.bak .depend
+	rm -f $(LIB) core *.bak $(obj).depend
 
 cam5200_flash.o:	cam5200_flash.c
 	$(CC) $(CFLAGS) -fno-strict-aliasing -c -o $@ $<