ARM: dts: qcom: fix flash node naming for RB3011

rename node to comply with dt-schema

Fix warning:
arch/arm/boot/dts/qcom-ipq8064-rb3011.dt.yaml: s25fl016k@0: $nodename:0: 's25fl016k@0' does not match '^flash(@.*)?$'
	From schema: Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml

Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211020204145.235050-1-david@ixit.cz

arch/arm/boot/dts/qcom-ipq8064-rb3011.dts

@@ -172,7 +172,7 @@
 
 				cs-gpios = <&qcom_pinmux 20 GPIO_ACTIVE_HIGH>;
 
-				norflash: s25fl016k@0 {
+				norflash: flash@0 {
 					compatible = "jedec,spi-nor";
 					#address-cells = <1>;
 					#size-cells = <1>;