arm64: dts: qcom: sa8775p: add the Power On device node

Add the PON node to PMIC #0 for sa8775p platforms.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230327125316.210812-9-brgl@bgdev.pl

arch/arm64/boot/dts/qcom/sa8775p-pmics.dtsi

@@ -12,6 +12,14 @@ pmm8654au_0: pmic@0 {
 		reg = <0x0 SPMI_USID>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+
+		pmm8654au_0_pon: pon@1200 {
+			compatible = "qcom,pmk8350-pon";
+			reg = <0x1200>, <0x800>;
+			reg-names = "hlos", "pbs";
+			mode-recovery = <0x1>;
+			mode-bootloader = <0x2>;
+		};
 	};
 
 	pmm8654au_1: pmic@2 {