ARM: dts: qcom-sdx55: align RPMh regulator nodes with bindings

Device node names should be generic and bindings expect certain pattern
for RPMh regulator nodes.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Konrad Dybcio <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm/boot/dts/qcom-sdx55-mtp.dts

···
 };
 
 &apps_rsc {
-	pmx55-rpmh-regulators {
+	regulators-0 {
 		compatible = "qcom,pmx55-rpmh-regulators";
 		qcom,pmic-id = "e";
 

arch/arm/boot/dts/qcom-sdx55-t55.dts

···
 };
 
 &apps_rsc {
-	pmx55-rpmh-regulators {
+	regulators-0 {
 		compatible = "qcom,pmx55-rpmh-regulators";
 		qcom,pmic-id = "e";
 

arch/arm/boot/dts/qcom-sdx55-telit-fn980-tlb.dts

···
 };
 
 &apps_rsc {
-	pmx55-rpmh-regulators {
+	regulators-0 {
 		compatible = "qcom,pmx55-rpmh-regulators";
 		qcom,pmic-id = "e";