arm64: dts: qcom: sa8295p-adp: Add RTC node

The first PM8540 PMIC has an available RTC block, describe this in the
SA8295P ADP. Mark it as wakeup-source to allow waking the system from
sleep.
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221205174309.16733-1-quic_bjorande@quicinc.com

arch/arm64/boot/dts/qcom/sa8295p-adp.dts

@@ -271,6 +271,14 @@ pm8450a: pmic@0 {
 		#address-cells = <1>;
 		#size-cells = <0>;
 
+		rtc@6000 {
+			compatible = "qcom,pm8941-rtc";
+			reg = <0x6000>;
+			reg-names = "rtc", "alarm";
+			interrupts = <0x0 0x61 0x1 IRQ_TYPE_NONE>;
+			wakeup-source;
+		};
+
 		pm8450a_gpios: gpio@c000 {
 			compatible = "qcom,pm8150-gpio", "qcom,spmi-gpio";
 			reg = <0xc000>;