ARM: dts: sam9x60: fix compatible for qspi child node

Change the compatible of the qspi child node to
`jedec,spi-nor` so that it can be properly found
when probing the bus.

Signed-off-by: Sergiu Moga <sergiu.moga@microchip.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
diff --git a/arch/arm/dts/sam9x60ek.dts b/arch/arm/dts/sam9x60ek.dts
index 32ffe93..4258e8e 100644
--- a/arch/arm/dts/sam9x60ek.dts
+++ b/arch/arm/dts/sam9x60ek.dts
@@ -49,7 +49,7 @@
 				status = "okay";
 
 				nor_flash: sst26vf064@0 {
-					compatible = "spi-flash";
+					compatible = "jedec,spi-nor";
 					reg = <0>;
 					spi-max-frequency = <80000000>;
 					spi-rx-bus-width = <4>;