ARM: dts: qcom: msm8960: drop useless rpm regulators node

The set of regulators available over the RPM requests is not a property
of the SoC. The only msm8960 board file (qcom-msm8960-cdp) also defines
this node together with the compatible string. Drop the useless device
node.
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230928110309.1212221-32-dmitry.baryshkov@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm/boot/dts/qcom/qcom-msm8960.dtsi

@@ -200,10 +200,6 @@ rpm: rpm@108000 {
 				     <GIC_SPI 21 IRQ_TYPE_EDGE_RISING>,
 				     <GIC_SPI 22 IRQ_TYPE_EDGE_RISING>;
 			interrupt-names = "ack", "err", "wakeup";
-
-			regulators {
-				compatible = "qcom,rpm-pm8921-regulators";
-			};
 		};
 
 		acc0: clock-controller@2088000 {