powerpc/mpc8xxx: fix recognition of DIMMs with ECC and Address Parity

To recognize DIMMs with ECC capability by testing ECC bit only. Not to be
confused by Address Parity bit.

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

arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c

@@ -367,7 +367,8 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params,
 	/* Determine if all DIMMs ECC capable. */
 	temp1 = 1;
 	for (i = 0; i < number_of_dimms; i++) {
-		if (dimm_params[i].n_ranks && dimm_params[i].edc_config != 2) {
+		if (dimm_params[i].n_ranks &&
+			!(dimm_params[i].edc_config & EDC_ECC)) {
 			temp1 = 0;
 			break;
 		}

arch/powerpc/include/asm/fsl_ddr_dimm_params.h

@@ -9,6 +9,10 @@
 #ifndef DDR2_DIMM_PARAMS_H
 #define DDR2_DIMM_PARAMS_H
 
+#define EDC_DATA_PARITY	1
+#define EDC_ECC		2
+#define EDC_AC_PARITY	4
+
 /* Parameters for a DDR2 dimm computed from the SPD */
 typedef struct dimm_params_s {