85xx: separate FLASH BASE virtual from physical address

Added a CONFIG_SYS_FLASH_BASE_PHYS for use as the physical address and
maintain CONFIG_SYS_FLASH_BASE as the virtual address of the flash.

This allows us to deal with 36-bit phys on these boards in the future.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Andy Fleming <afleming@freescale.com>
diff --git a/board/freescale/mpc8572ds/law.c b/board/freescale/mpc8572ds/law.c
index 9814479..02ea0ec 100644
--- a/board/freescale/mpc8572ds/law.c
+++ b/board/freescale/mpc8572ds/law.c
@@ -28,7 +28,7 @@
 #include <asm/mmu.h>
 
 struct law_entry law_table[] = {
-	SET_LAW(CONFIG_SYS_FLASH_BASE, LAW_SIZE_256M, LAW_TRGT_IF_LBC),
+	SET_LAW(CONFIG_SYS_FLASH_BASE_PHYS, LAW_SIZE_256M, LAW_TRGT_IF_LBC),
 	SET_LAW(CONFIG_SYS_PCIE1_MEM_PHYS, LAWAR_SIZE_512M, LAW_TRGT_IF_PCIE_1),
 	SET_LAW(CONFIG_SYS_PCIE1_IO_PHYS, LAW_SIZE_64K, LAW_TRGT_IF_PCIE_1),
 	SET_LAW(CONFIG_SYS_PCIE2_MEM_PHYS, LAWAR_SIZE_512M, LAW_TRGT_IF_PCIE_2),