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