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

Bindings expect VADC node name to be "adc":

  pmic@0: 'vadc@3100' 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>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220828084341.112146-7-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/pm8953.dtsi

@@ -45,7 +45,7 @@ temp-alarm@2400 {
 			#thermal-sensor-cells = <0>;
 		};
 
-		pm8953_vadc: vadc@3100 {
+		pm8953_vadc: adc@3100 {
 			compatible = "qcom,spmi-vadc";
 			reg = <0x3100>;
 			interrupts = <0x00 0x31 0x00 0x01>;