arm64: dts: meson-gx: Fix the SCPI DVFS node name and unit address

Node names should be generic and use hyphens instead of underscores to
not cause warnings. Also nodes without a reg property should not have a
unit-address. Change the scpi_dvfs node to use clock-controller as node
name without a unit address (since it does not have a reg property).

Fixes: 70db166a2b ("ARM64: dts: meson-gxbb: Add SCPI with cpufreq & sensors Nodes")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20230111211350.1461860-7-martin.blumenstingl@googlemail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

arch/arm64/boot/dts/amlogic/meson-gx.dtsi

@@ -250,7 +250,7 @@
 		scpi_clocks: clocks {
 			compatible = "arm,scpi-clocks";
 
-			scpi_dvfs: scpi_clocks@0 {
+			scpi_dvfs: clock-controller {
 				compatible = "arm,scpi-dvfs-clocks";
 				#clock-cells = <1>;
 				clock-indices = <0>;