arm64: dts: qcom: align SPMI PMIC regulators node name with dtschema

Bindings expect regulators node name to be "regulators":

  qcom/sdm630-sony-xperia-nile-voyager.dtb: pmic@3: 'pm660l-regulators' does not match any of the regexes
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220828084341.112146-8-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/pm660.dtsi

@@ -187,7 +187,7 @@ pmic@1 {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
-		pm660_spmi_regulators: pm660-regulators {
+		pm660_spmi_regulators: regulators {
 			compatible = "qcom,pm660-regulators";
 		};
 	};

arch/arm64/boot/dts/qcom/pm660l.dtsi

@@ -81,7 +81,7 @@ pm660l_wled: leds@d800 {
 			status = "disabled";
 		};
 
-		pm660l_spmi_regulators: pm660l-regulators {
+		pm660l_spmi_regulators: regulators {
 			compatible = "qcom,pm660l-regulators";
 		};
 	};