ARM: at91: at91sam9n12: add DT parameters to enable PMECC

Default ecc correctable setting is 2bits in 512 bytes.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/at91sam9n12.dtsi

@@ -390,8 +390,9 @@
 			reg = < 0x40000000 0x10000000
 				0xffffe000 0x00000600
 				0xffffe600 0x00000200
-				0x00100000 0x00100000
+				0x00108000 0x00018000
 			       >;
+			atmel,pmecc-lookup-table-offset = <0x0 0x8000>;
 			atmel,nand-addr-offset = <21>;
 			atmel,nand-cmd-offset = <22>;
 			pinctrl-names = "default";

arch/arm/boot/dts/at91sam9n12ek.dts

@@ -71,7 +71,10 @@
 
 		nand0: nand@40000000 {
 			nand-bus-width = <8>;
-			nand-ecc-mode = "soft";
+			nand-ecc-mode = "hw";
+			atmel,has-pmecc;
+			atmel,pmecc-cap = <2>;
+			atmel,pmecc-sector-size = <512>;
 			nand-on-flash-bbt;
 			status = "okay";
 		};