mtd: nand: mxs_nand: add device tree support

Support driver data from device tree. Also support fsl,use-minimal-ecc
similar to Linux' GPMI NAND driver.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index c039b9c..bdc2721 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -154,6 +154,13 @@
 
 if NAND_MXS
 
+config NAND_MXS_DT
+	bool "Support MXS NAND controller as a DT device"
+	depends on OF_CONTROL && MTD
+	help
+	  Enable the driver for MXS NAND flash on platforms using
+	  device tree.
+
 config NAND_MXS_USE_MINIMUM_ECC
 	bool "Use minimum ECC strength supported by the controller"
 	default false