mpc83xx: Get rid of CONFIG_SYS_DDR_BASE

CONFIG_SYS_DDR_BASE is specific to mpc83xx an is always set to the same
value as CONFIG_SYS_SDRAM_BASE. Just use CONFIG_SYS_SDRAM_BASE instead.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
diff --git a/board/tqc/tqm834x/tqm834x.c b/board/tqc/tqm834x/tqm834x.c
index c75251e..04941b2 100644
--- a/board/tqc/tqm834x/tqm834x.c
+++ b/board/tqc/tqm834x/tqm834x.c
@@ -72,13 +72,13 @@
 	int cs;
 
 	/* during size detection, set up the max DDRLAW size */
-	im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_BASE;
+	im->sysconf.ddrlaw[0].bar = CONFIG_SYS_SDRAM_BASE;
 	im->sysconf.ddrlaw[0].ar = (LAWAR_EN | LAWAR_SIZE_2G);
 
 	/* set CS bounds to maximum size */
 	for(cs = 0; cs < 4; ++cs) {
 		set_cs_bounds(cs,
-			CONFIG_SYS_DDR_BASE + (cs * DDR_MAX_SIZE_PER_CS),
+			CONFIG_SYS_SDRAM_BASE + (cs * DDR_MAX_SIZE_PER_CS),
 			DDR_MAX_SIZE_PER_CS);
 
 		set_cs_config(cs, INITIAL_CS_CONFIG);
@@ -102,7 +102,7 @@
 		debug("\nDetecting Bank%d\n", cs);
 
 		bank_size = get_ddr_bank_size(cs,
-			(long *)(CONFIG_SYS_DDR_BASE + size));
+			(long *)(CONFIG_SYS_SDRAM_BASE + size));
 		size += bank_size;
 
 		debug("DDR Bank%d size: %ld MiB\n\n", cs, bank_size >> 20);