40x_spd_sdram.c: Fix GCC 4.6 build warnings

Fix:
40x_spd_sdram.c: In function 'spd_sdram':
40x_spd_sdram.c:137:6: warning: variable 'sdram0_b3cr' set but not used [-Wunused-but-set-variable]
40x_spd_sdram.c:136:6: warning: variable 'sdram0_b2cr' set but not used [-Wunused-but-set-variable]
40x_spd_sdram.c:129:6: warning: variable 'sdram0_ecccfg' set but not used [-Wunused-but-set-variable]

Signed-off-by: Stefan Roese <sr@denx.de>

arch/powerpc/cpu/ppc4xx/40x_spd_sdram.c

@@ -116,26 +116,25 @@ long int spd_sdram(int(read_spd)(uint addr))
 {
 	int tmp,row,col;
 	int total_size,bank_size,bank_code;
-	int ecc_on;
 	int mode;
 	int bank_cnt;
 
 	int sdram0_pmit=0x07c00000;
+	int sdram0_b0cr;
+	int sdram0_b1cr = 0;
 #ifndef CONFIG_405EP /* not on PPC405EP */
+	int sdram0_b2cr = 0;
+	int sdram0_b3cr = 0;
 	int sdram0_besr0 = -1;
 	int sdram0_besr1 = -1;
 	int sdram0_eccesr = -1;
-#endif
 	int sdram0_ecccfg;
+	int ecc_on;
+#endif
 
 	int sdram0_rtr=0;
 	int sdram0_tr=0;
 
-	int sdram0_b0cr;
-	int sdram0_b1cr;
-	int sdram0_b2cr;
-	int sdram0_b3cr;
-
 	int sdram0_cfg=0;
 
 	int t_rp;
@@ -295,6 +294,7 @@ long int spd_sdram(int(read_spd)(uint addr))
 	if (bank_cnt > 4)	/* we only have 4 banks to work with */
 		SPD_ERR("SDRAM - unsupported module rows for this width\n");
 
+#ifndef CONFIG_405EP /* not on PPC405EP */
 	/* now check for ECC ability of module. We only support ECC
 	 *   on 32 bit wide devices with 8 bit ECC.
 	 */
@@ -305,6 +305,7 @@ long int spd_sdram(int(read_spd)(uint addr))
 		sdram0_ecccfg = 0;
 		ecc_on = 0;
 	}
+#endif
 
 	/*------------------------------------------------------------------
 	 * calculate total size
@@ -378,9 +379,6 @@ long int spd_sdram(int(read_spd)(uint addr))
 	 * using the calculated values, compute the bank
 	 * config register values.
 	 * -------------------------------------------------------------------*/
-	sdram0_b1cr = 0;
-	sdram0_b2cr = 0;
-	sdram0_b3cr = 0;
 
 	/* compute the size of each bank */
 	bank_size = total_size / bank_cnt;
@@ -444,8 +442,10 @@ long int spd_sdram(int(read_spd)(uint addr))
 	/* SDRAM have a power on delay,	 500 micro should do */
 	udelay(500);
 	sdram0_cfg = SDRAM0_CFG_DCE | SDRAM0_CFG_BRPF(1) | SDRAM0_CFG_ECCDD | SDRAM0_CFG_EMDULR;
+#ifndef CONFIG_405EP /* not on PPC405EP */
 	if (ecc_on)
 		sdram0_cfg |= SDRAM0_CFG_MEMCHK;
+#endif
 	mtsdram(SDRAM0_CFG, sdram0_cfg);
 
 	return (total_size);