mpc85xx: Add support for the MPC8572DS reference board

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/Makefile b/Makefile
index 89fea72..95f4c33 100644
--- a/Makefile
+++ b/Makefile
@@ -2265,6 +2265,9 @@
 MPC8568MDS_config:	unconfig
 	@$(MKCONFIG) $(@:_config=) ppc mpc85xx mpc8568mds freescale
 
+MPC8572DS_config:       unconfig
+	@$(MKCONFIG) $(@:_config=) ppc mpc85xx mpc8572ds freescale
+
 PM854_config:	unconfig
 	@$(MKCONFIG) $(@:_config=) ppc mpc85xx pm854