NAND: Add support for MPC8572DS board

This patch defines 1M TLB&LAW size for NAND on MPC8572DS, 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, to
make room for the increased code size with NAND enabled.

Signed-off-by: Jason Jin <Jason.Jin@freescale.com>
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/board/freescale/mpc8572ds/tlb.c b/board/freescale/mpc8572ds/tlb.c
index 1c5ed3f..8d1f646 100644
--- a/board/freescale/mpc8572ds/tlb.c
+++ b/board/freescale/mpc8572ds/tlb.c
@@ -80,6 +80,12 @@
 	SET_TLB_ENTRY(1, CONFIG_SYS_PCIE3_IO_PHYS, CONFIG_SYS_PCIE3_IO_PHYS,
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 		      0, 6, BOOKE_PAGESZ_256K, 1),
+
+	/* *I*G - NAND */
+	SET_TLB_ENTRY(1, CONFIG_SYS_NAND_BASE, CONFIG_SYS_NAND_BASE_PHYS,
+		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+		      0, 7, BOOKE_PAGESZ_1M, 1),
+
 };
 
 int num_tlb_entries = ARRAY_SIZE(tlb_table);