ARM: dts: qcom: apq8060-dragonboard: rename mpp ADC channels to adc-channel

Use generic `adc-channel@N' node names for board-specific ADC channels
(routed to MPP pins) to follow the schema.
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230928110309.1212221-35-dmitry.baryshkov@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm/boot/dts/qcom/qcom-apq8060-dragonboard.dts

@@ -997,23 +997,27 @@ &pm8058_xoadc {
 	xoadc-ref-supply = <&pm8058_l18>;
 
 	/* Board-specific channels */
-	mpp5@5 {
+	adc-channel@5 {
 		/* Connected to AOUT of ALS sensor */
 		reg = <0x00 0x05>;
 	};
-	mpp6@6 {
+
+	adc-channel@6 {
 		/* Connected to test point TP43 */
 		reg = <0x00 0x06>;
 	};
-	mpp7@7 {
+
+	adc-channel@7 {
 		/* Connected to battery thermistor */
 		reg = <0x00 0x07>;
 	};
-	mpp8@8 {
+
+	adc-channel@8 {
 		/* Connected to battery ID detector */
 		reg = <0x00 0x08>;
 	};
-	mpp9@9 {
+
+	adc-channel@9 {
 		/* Connected to XO thermistor */
 		reg = <0x00 0x09>;
 	};