MPC8xxx: drop redundant boot messages

Current code would print RAM size information like this:

	DRAM:  DDR: 256 MiB (DDR1, 64-bit, CL=2, ECC off)

Turn a number of printf()s into debug() to get rid of the redundant
"DDR: " string like this:

	DRAM:  256 MiB (DDR1, 64-bit, CL=2, ECC off)

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/board/freescale/mpc8610hpcd/mpc8610hpcd.c b/board/freescale/mpc8610hpcd/mpc8610hpcd.c
index 4e4b7c0..8aceddb 100644
--- a/board/freescale/mpc8610hpcd/mpc8610hpcd.c
+++ b/board/freescale/mpc8610hpcd/mpc8610hpcd.c
@@ -145,7 +145,7 @@
 
 	setup_ddr_bat(dram_size);
 
-	puts(" DDR: ");
+	debug(" DDR: ");
 	return dram_size;
 }