85xx: remove the unused ddr_enable_ecc in the board file

The DDR controller of 8548/8544/8568/8572/8536 processors
have the ECC data init feature, and the new DDR code is
using the feature, and we don't need the way with DMA to
init memory any more.

Signed-off-by: Dave Liu <daveliu@freescale.com>
Acked-by: Andy Fleming <afleming@freescale.com>
diff --git a/include/configs/MPC8572DS.h b/include/configs/MPC8572DS.h
index c3693b8..ed25c99 100644
--- a/include/configs/MPC8572DS.h
+++ b/include/configs/MPC8572DS.h
@@ -99,6 +99,7 @@
 #define CONFIG_DDR_SPD
 #undef CONFIG_DDR_DLL
 
+#define CONFIG_ECC_INIT_VIA_DDRCONTROLLER
 #define CONFIG_MEM_INIT_VALUE	0xDeadBeef
 
 #define CONFIG_SYS_DDR_SDRAM_BASE	0x00000000