bpc.mitm/exo: support pmic reboot/shutdown on mariko (thanks @CTCaer)

exosphere/program/source/secmon_user_power_management.hpp

@@ -23,11 +23,13 @@ namespace ams::secmon {
         UserRebootType_ToRcm        = 1,
         UserRebootType_ToPayload    = 2,
         UserRebootType_ToFatalError = 3,
+        UserRebootType_ByPmic       = 4,
     };
 
     void PerformUserRebootToRcm();
     void PerformUserRebootToPayload();
     void PerformUserRebootToFatalError();
+    void PerformUserRebootByPmic();
     void PerformUserShutDown();
 
 }