ARM: dts: at91: at91sam9g20-taurus: fix SPI bus unit address

w+arch/arm/dts/.at91sam9g20-taurus.dtb.pre.tmp:79.18-83.4: Warning (spi_bus_reg): /ahb/apb/spi@fffc8000/mtd_dataflash@0: SPI bus unit address format error, expected "1"

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>

arch/arm/dts/at91sam9g20-taurus.dts

@@ -76,7 +76,7 @@
 
 &spi0 {
 	cs-gpios = <0>, <&pioC 11 0>, <0>, <0>;
-	mtd_dataflash@0 {
+	mtd_dataflash@1 {
 		compatible = "atmel,at45", "atmel,dataflash";
 		spi-max-frequency = <50000000>;
 		reg = <1>;