corenet_ds: Enable ECC for corenet_ds

ECC can be turned on/off by hwconfig without recompiling. So enable it
by default.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

include/configs/corenet_ds.h

@@ -80,7 +80,7 @@
 #define CONFIG_BACKSIDE_L2_CACHE
 #define CONFIG_SYS_INIT_L2CSR0		L2CSR0_L2E
 #define CONFIG_BTB			/* toggle branch predition */
-/*#define	CONFIG_DDR_ECC*/
+#define	CONFIG_DDR_ECC
 #ifdef CONFIG_DDR_ECC
 #define CONFIG_ECC_INIT_VIA_DDRCONTROLLER
 #define CONFIG_MEM_INIT_VALUE		0xdeadbeef