ARM: dts: da850-evm: Use generic jedec, spi-nor for flash

Logic PD re-spun the L138 and AM1808 SOM's with larger flash.
The m25p80 driver has a generic 'jedec,spi-nor' compatible option
which is requests to use whenever possible since it will read the
JEDEC READ ID opcode.

Signed-off-by: Adam Ford <[e-mail]>
Signed-off-by: Sekhar Nori <[e-mail]>

arch/arm/boot/dts/da850-evm.dts

···
 	flash: m25p80@0 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		compatible = "m25p64";
+		compatible = "jedec,spi-nor";
 		spi-max-frequency = <30000000>;
 		m25p,fast-read;
 		reg = <0>;