arm64: dts: qcom: enable rtc on sm8250-mtp board

Enable PMIC's RTC device on SM8250-MTP board.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20201103005432.1181832-2-dmitry.baryshkov@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/sm8250-mtp.dts

@@ -378,6 +378,10 @@ &i2c15 {
 	/* rtc6226 @ 64 */
 };
 
+&pm8150_rtc {
+	status = "okay";
+};
+
 &qupv3_id_0 {
 	status = "okay";
 };