mpc85xx: Implement workaround for erratum DDR-A003

Erratum DDR-A003 requires workaround to correctly set RCW10 for registered DIMM.
Also adding polling after enabling DDR controller to ensure completion.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/include/asm/config_mpc85xx.h b/arch/powerpc/include/asm/config_mpc85xx.h
index 8ba6c7e..5792f2f 100644
--- a/arch/powerpc/include/asm/config_mpc85xx.h
+++ b/arch/powerpc/include/asm/config_mpc85xx.h
@@ -163,6 +163,7 @@
 #define CONFIG_NUM_DDR_CONTROLLERS	2
 #define CONFIG_SYS_FSL_ERRATUM_CPC_A002
 #define CONFIG_SYS_FSL_ERRATUM_CPC_A003
+#define CONFIG_SYS_FSL_ERRATUM_DDR_A003
 #define CONFIG_SYS_FSL_ERRATUM_ELBC_A001
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC111
 #define CONFIG_SYS_FSL_ERRATUM_ESDHC135