ti816x: Enable NAND

The TI8168-EVM comes with NAND on board.  Enable it and move environment
over there.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/ti/ti816x/evm.c b/board/ti/ti816x/evm.c
index ad98e09..8f07e2c 100644
--- a/board/ti/ti816x/evm.c
+++ b/board/ti/ti816x/evm.c
@@ -25,11 +25,13 @@
 int board_init(void)
 {
 	gd->bd->bi_boot_params = PHYS_DRAM_1 + 0x100;
+#if defined(CONFIG_NAND)
+	gpmc_init();
+#endif
 	return 0;
 }
 
 #ifdef CONFIG_SPL_BUILD
-
 static struct module_pin_mux mmc_pin_mux[] = {
 	{ OFFSET(pincntl157), PULLDOWN_EN | PULLUDDIS | MODE(0x0) },
 	{ OFFSET(pincntl158), PULLDOWN_EN | PULLUDEN | MODE(0x0) },