85xx: Fix how we map DDR memory

Previously we only allowed power-of-two memory sizes and didnt
handle >2G of memory.  Now we will map up to CONFIG_MAX_MEM_MAPPED
and should properly handle any size that we can make in the TLBs
we have available to us

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/include/configs/MPC8572DS.h b/include/configs/MPC8572DS.h
index ac0a464..a2360d8 100644
--- a/include/configs/MPC8572DS.h
+++ b/include/configs/MPC8572DS.h
@@ -103,6 +103,7 @@
 
 /* DDR Setup */
 #define CONFIG_SYS_DDR_TLB_START 9
+#define CONFIG_VERY_BIG_RAM
 #define CONFIG_FSL_DDR2
 #undef CONFIG_FSL_DDR_INTERACTIVE
 #define CONFIG_SPD_EEPROM		/* Use SPD EEPROM for DDR setup */