mpc83xx: convert to using do_fixup_*()

convert to using simpler mpc85xx style fdt update code; streamline by
eliminating macros OF_SOC, OF_CPU, etc. which allows us to rm
the old school FLAT_TREE code from 83xx (since the sbc8349 was just
converted over to using libfdt).

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/include/configs/MPC8360EMDS.h b/include/configs/MPC8360EMDS.h
index c192f33..fedb8a9 100644
--- a/include/configs/MPC8360EMDS.h
+++ b/include/configs/MPC8360EMDS.h
@@ -347,14 +347,8 @@
 
 /* pass open firmware flat tree */
 #define CONFIG_OF_LIBFDT	1
-#undef  CONFIG_OF_FLAT_TREE
 #define CONFIG_OF_BOARD_SETUP	1
-
-#define OF_CPU			"PowerPC,8360@0"
-#define OF_SOC			"soc8360@e0000000"
-#define OF_QE			"qe@e0100000"
-#define OF_TBCLK		(bd->bi_busfreq / 4)
-#define OF_STDOUT_PATH		"/soc8360@e0000000/serial@4500"
+#define CONFIG_OF_STDOUT_VIA_ALIAS	1
 
 /* I2C */
 #define CONFIG_HARD_I2C		/* I2C with hardware support */