ARM: dts: imx6sx-sdb: Fix the reg properties for the FSL QSPI nodes

The current driver does not use the reg properties, but we will
add a new driver soon. To make sure we have a consistent scheme,
let's fix the reg properties here.

Signed-off-by: Frieder Schrempf <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx6sx-sdb-reva.dts

···
 		spi-max-frequency = <66000000>;
 	};
 
-	flash1: s25fl128s@1 {
-		reg = <1>;
+	flash1: s25fl128s@2 {
+		reg = <2>;
 		#address-cells = <1>;
 		#size-cells = <1>;
 		compatible = "spansion,s25fl128s", "jedec,spi-nor";

arch/arm/boot/dts/imx6sx-sdb.dts

···
 		reg = <0>;
 	};
 
-	flash1: n25q256a@1 {
+	flash1: n25q256a@2 {
 		#address-cells = <1>;
 		#size-cells = <1>;
 		compatible = "micron,n25q256a", "jedec,spi-nor";
 		spi-max-frequency = <29000000>;
-		reg = <1>;
+		reg = <2>;
 	};
 };