mpc83xx: fix mpc8313/mpc8315/mpc8349itx Makefiles for silent build (with -s)

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/board/freescale/mpc8313erdb/Makefile b/board/freescale/mpc8313erdb/Makefile
index a987e510..e97ba81 100644
--- a/board/freescale/mpc8313erdb/Makefile
+++ b/board/freescale/mpc8313erdb/Makefile
@@ -32,7 +32,7 @@
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(obj).depend $(OBJS)
-	$(AR) crv $@ $(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS)
 
 clean:
 	rm -f $(SOBJS) $(OBJS)