Pass unit name to dspi child nodes to fix the following build warnings
with W=1:
arch/arm64/boot/dts/freescale/fsl-ls2080a-qds.dtb: Warning (unit_address_vs_reg): Node /soc/dspi@
2100000/n25q128a has a reg or ranges property, but no unit name
arch/arm64/boot/dts/freescale/fsl-ls2080a-qds.dtb: Warning (unit_address_vs_reg): Node /soc/dspi@
2100000/sst25wf040b has a reg or ranges property, but no unit name
arch/arm64/boot/dts/freescale/fsl-ls2080a-qds.dtb: Warning (unit_address_vs_reg): Node /soc/dspi@
2100000/en25s64 has a reg or ranges property, but no unit name
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
 
 
 &dspi {
        status = "okay";
-       dflash0: n25q128a {
+       dflash0: n25q128a@0 {
                #address-cells = <1>;
                #size-cells = <1>;
                compatible = "st,m25p80";
                spi-max-frequency = <3000000>;
                reg = <0>;
        };
-       dflash1: sst25wf040b {
+       dflash1: sst25wf040b@1 {
                #address-cells = <1>;
                #size-cells = <1>;
                compatible = "st,m25p80";
                spi-max-frequency = <3000000>;
                reg = <1>;
        };
-       dflash2: en25s64 {
+       dflash2: en25s64@2 {
                #address-cells = <1>;
                #size-cells = <1>;
                compatible = "st,m25p80";