Update MPC8568 MDS to use libfdt

Updated the MPC8568 MDS config to use libfdt and assume use of aliases for
ethernet, pci, and serial for the various fixups that are done.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/MPC8568MDS.h b/include/configs/MPC8568MDS.h
index cf79257..2f4bc70 100644
--- a/include/configs/MPC8568MDS.h
+++ b/include/configs/MPC8568MDS.h
@@ -296,14 +296,9 @@
 #endif
 
 /* pass open firmware flat tree */
-#define CONFIG_OF_FLAT_TREE	1
-#define CONFIG_OF_BOARD_SETUP	1
-
-#define OF_CPU			"PowerPC,8568@0"
-#define OF_SOC			"soc8568@e0000000"
-#define OF_QE			"qe@e0080000"
-#define OF_TBCLK		(bd->bi_busfreq / 8)
-#define OF_STDOUT_PATH		"/soc8568@e0000000/serial@4500"
+#define CONFIG_OF_LIBFDT		1
+#define CONFIG_OF_BOARD_SETUP		1
+#define CONFIG_OF_STDOUT_VIA_ALIAS	1
 
 /*
  * I2C