am335x_evm: enable NAND support

Enable NAND support for AM335X boards.

Signed-off-by: Ilya Yanok <ilya.yanok@cogentembedded.com>
diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index b56a801..6908378 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -318,6 +318,8 @@
 
 	gd->bd->bi_boot_params = PHYS_DRAM_1 + 0x100;
 
+	gpmc_init();
+
 	return 0;
 }