mtd: nand: mxs_nand: allow to enable BBT support

Add config option which allows to enable on flash bad block table
support. This has the same effect as when using the device tree
property "nand-on-flash-bbt" in Linux.
Signed-off-by: NStefan Agner <stefan.agner@toradex.com>

drivers/mtd/nand/mxs_nand.c

@@ -1213,6 +1213,10 @@ void board_nand_init(void)
 
 	memset(&fake_ecc_layout, 0, sizeof(fake_ecc_layout));
 
+#ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
+	nand->bbt_options |= NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB;
+#endif
+
 	nand_set_controller_data(nand, nand_info);
 	nand->options |= NAND_NO_SUBPAGE_WRITE;