arm64: dts: qcom: sc8280xp-pmics: add pmk8280 sdam nvram

Add one of the PMK8280 SDAM blocks which can be used to store an RTC
offset.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230202155448.6715-21-johan+linaro@kernel.org

arch/arm64/boot/dts/qcom/sc8280xp-pmics.dtsi

@@ -104,6 +104,15 @@ pmk8280_rtc: rtc@6100 {
 			wakeup-source;
 			status = "disabled";
 		};
+
+		pmk8280_sdam_6: nvram@8500 {
+			compatible = "qcom,spmi-sdam";
+			reg = <0x8500 0x100>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x8500 0x100>;
+			status = "disabled";
+		};
 	};
 
 	pmc8280_1: pmic@1 {