mtd: mxs_nand: Support EDO mode for imx8mn architecture

Add support for imx8mn architecture in order to run the NAND
in fast edo mode.

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Reviewed-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
diff --git a/include/mxs_nand.h b/include/mxs_nand.h
index 741dc87..bb5b84b 100644
--- a/include/mxs_nand.h
+++ b/include/mxs_nand.h
@@ -12,6 +12,7 @@
 #include <asm/cache.h>
 #include <nand.h>
 #include <asm/mach-imx/dma.h>
+#include <clk.h>
 
 /**
  * @gf_len:                   The length of Galois Field. (e.g., 13 or 14)
@@ -43,6 +44,7 @@
 	struct nand_chip chip;
 	struct udevice *dev;
 	unsigned int	max_ecc_strength_supported;
+	int		max_chain_delay;
 	bool		use_minimum_ecc;
 	int		cur_chip;
 
@@ -59,6 +61,7 @@
 
 	struct mxs_gpmi_regs *gpmi_regs;
 	struct mxs_bch_regs *bch_regs;
+	struct clk *gpmi_clk;
 
 	/* Functions with altered behaviour */
 	int		(*hooked_read_oob)(struct mtd_info *mtd,