NAND: Add NAND support for MPC8536DS board

This patch defines 1M TLB&LAW size for NAND on MPC8536DS, assigns 0xffa00000
for CONFIG_SYS_NAND_BASE and adds other NAND supports in config file.
It also moves environment(CONFIG_ENV_ADDR) outside of u-boot image.

Singed-off-by: Jason Jin <Jason.Jin@freescale.com>
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/board/freescale/mpc8536ds/law.c b/board/freescale/mpc8536ds/law.c
index 8013d41..0861fa7 100644
--- a/board/freescale/mpc8536ds/law.c
+++ b/board/freescale/mpc8536ds/law.c
@@ -38,6 +38,7 @@
 	SET_LAW(CONFIG_SYS_PCIE3_MEM_PHYS, LAWAR_SIZE_512M, LAW_TRGT_IF_PCIE_3),
 	SET_LAW(CONFIG_SYS_PCIE3_IO_PHYS, LAW_SIZE_64K, LAW_TRGT_IF_PCIE_3),
 	SET_LAW(PIXIS_BASE, LAW_SIZE_4K, LAW_TRGT_IF_LBC),
+	SET_LAW(CONFIG_SYS_NAND_BASE_PHYS, LAW_SIZE_1M, LAW_TRGT_IF_LBC),
 };
 
 int num_law_entries = ARRAY_SIZE(law_table);