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

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/cpu/sh3/Makefile b/cpu/sh3/Makefile
index 441c765..a7eb1e2 100644
--- a/cpu/sh3/Makefile
+++ b/cpu/sh3/Makefile
@@ -45,7 +45,7 @@
 	rm -f $(SOBJS) $(OBJS)
 
 distclean:	clean
-	rm -f $(LIB) core *.bak .depend
+	rm -f $(LIB) core *.bak $(obj).depend
 
 #########################################################################
 
diff --git a/cpu/sh4/Makefile b/cpu/sh4/Makefile
index 6192913..e38e04f 100644
--- a/cpu/sh4/Makefile
+++ b/cpu/sh4/Makefile
@@ -42,7 +42,7 @@
 	rm -f $(SOBJS) $(OBJS)
 
 distclean:	clean
-	rm -f $(LIB) core *.bak .depend
+	rm -f $(LIB) core *.bak $(obj).depend
 
 #########################################################################