mpc83xx: Get rid of CONFIG_SYS_DDR_SDRAM_BASE

CONFIG_SYS_DDR_SDRAM_BASE is set to the same value as
CONFIG_SYS_SDRAM_BASE on all existing boards. Just use
CONFIG_SYS_SDRAM_BASE instead.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/board/freescale/mpc8349itx/mpc8349itx.c b/board/freescale/mpc8349itx/mpc8349itx.c
index aaaea7c..81b3f00 100644
--- a/board/freescale/mpc8349itx/mpc8349itx.c
+++ b/board/freescale/mpc8349itx/mpc8349itx.c
@@ -37,14 +37,14 @@
 
 	im->sysconf.ddrlaw[0].ar =
 	    LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE);
-	im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000;
+	im->sysconf.ddrlaw[0].bar = CONFIG_SYS_SDRAM_BASE & 0xfffff000;
 
-#if ((CONFIG_SYS_DDR_SDRAM_BASE & 0x00FFFFFF) != 0)
+#if ((CONFIG_SYS_SDRAM_BASE & 0x00FFFFFF) != 0)
 #warning Chip select bounds is only configurable in 16MB increments
 #endif
 	im->ddr.csbnds[0].csbnds =
-		((CONFIG_SYS_DDR_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
-		(((CONFIG_SYS_DDR_SDRAM_BASE + ddr_size - 1) >>
+		((CONFIG_SYS_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) |
+		(((CONFIG_SYS_SDRAM_BASE + ddr_size - 1) >>
 				CSBNDS_EA_SHIFT) & CSBNDS_EA);
 	im->ddr.cs_config[0] = CONFIG_SYS_DDR_CS0_CONFIG;