powerpc/mpc8xxx: Move DDR RCW overriding to common code

DDR RCW varies at different speeds. It is common for all platform. Move it
out from corenet_ds.

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

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

@@ -272,6 +272,7 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
 	char buffer[HWCONFIG_BUFFER_SIZE];
 	char *buf = NULL;
 	const dynamic_odt_t *pdodt = odt_unknown;
+	ulong ddr_freq;
 
 	/*
 	 * Extract hwconfig from environment since we have not properly setup
@@ -716,6 +717,20 @@ unsigned int populate_memctl_options(int all_DIMMs_registered,
 	if (pdimm[0].n_ranks == 4)
 		popts->quad_rank_present = 1;
 
+	ddr_freq = get_ddr_freq(0) / 1000000;
+	if (popts->registered_dimm_en) {
+		popts->rcw_override = 1;
+		popts->rcw_1 = 0x000a5a00;
+		if (ddr_freq <= 800)
+			popts->rcw_2 = 0x00000000;
+		else if (ddr_freq <= 1066)
+			popts->rcw_2 = 0x00100000;
+		else if (ddr_freq <= 1333)
+			popts->rcw_2 = 0x00200000;
+		else
+			popts->rcw_2 = 0x00300000;
+	}
+
 	fsl_ddr_board_options(popts, pdimm, ctrl_num);
 
 	return 0;

board/freescale/corenet_ds/ddr.c

@@ -223,20 +223,6 @@ void fsl_ddr_board_options(memctl_options_t *popts,
 
 	/* DHC_EN =1, ODT = 60 Ohm */
 	popts->ddr_cdr1 = DDR_CDR1_DHC_EN;
-
-	/* override SPD values. rcw_2 should vary at differnt speed */
-	if (pdimm[0].registered_dimm == 1) {
-		popts->rcw_override = 1;
-		popts->rcw_1 = 0x000a5a00;
-		if (ddr_freq <= 800)
-			popts->rcw_2 = 0x00000000;
-		else if (ddr_freq <= 1066)
-			popts->rcw_2 = 0x00100000;
-		else if (ddr_freq <= 1333)
-			popts->rcw_2 = 0x00200000;
-		else
-			popts->rcw_2 = 0x00300000;
-	}
 }
 
 phys_size_t initdram(int board_type)