8544ds: Fix Makefile after moving pixis to board/freescale.

The OBJTREE != SRCTREE build scenario was broken.
This fixes it.

Signed-off-by: Ed Swarthout <Ed.Swarthout@freescale.com>
Signed-off-by: Jon Loeliger <jdl@freescale.com>

board/freescale/mpc8544ds/Makefile

@@ -24,9 +24,9 @@
 
 include $(TOPDIR)/config.mk
 
-# ifneq ($(OBJTREE),$(SRCTREE))
-# $(shell mkdir -p $(obj)./common)
-# endif
+ifneq ($(OBJTREE),$(SRCTREE))
+$(shell mkdir -p $(obj)../common)
+endif
 
 LIB	= $(obj)lib$(BOARD).a