arm64: zynqmp: Add device tree properties for nand flash

Add ecc strength & ecc step size properties for nand flash devices,
when operating in software-ecc mode.

Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/866f4b888129ff0213df9cdb51b5529b199fb7b7.1631713594.git.michal.simek@xilinx.com
diff --git a/arch/arm/dts/zynqmp-zc1751-xm016-dc2.dts b/arch/arm/dts/zynqmp-zc1751-xm016-dc2.dts
index 4225a95..f32f87a 100644
--- a/arch/arm/dts/zynqmp-zc1751-xm016-dc2.dts
+++ b/arch/arm/dts/zynqmp-zc1751-xm016-dc2.dts
@@ -140,6 +140,8 @@
 		nand-ecc-algo = "bch";
 		nand-rb = <0>;
 		label = "main-storage-0";
+		nand-ecc-step-size = <1024>;
+		nand-ecc-strength = <24>;
 
 		partition@0 {	/* for testing purpose */
 			label = "nand-fsbl-uboot";
@@ -174,6 +176,8 @@
 		nand-ecc-algo = "bch";
 		nand-rb = <0>;
 		label = "main-storage-1";
+		nand-ecc-step-size = <1024>;
+		nand-ecc-strength = <24>;
 
 		partition@0 {	/* for testing purpose */
 			label = "nand1-fsbl-uboot";