service: Add skeleton for psm service

Seems to be the power controller. Listed in switchbrew under the category PTM services.

src/core/hle/service/ptm/psm.cpp

@@ -0,0 +1,48 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <memory>
+
+#include "common/logging/log.h"
+#include "core/hle/ipc_helpers.h"
+#include "core/hle/service/ptm/psm.h"
+#include "core/hle/service/service.h"
+#include "core/hle/service/sm/sm.h"
+
+namespace Service::PSM {
+
+PSM::PSM() : ServiceFramework{"psm"} {
+    // clang-format off
+        static const FunctionInfo functions[] = {
+            {0, nullptr, "GetBatteryChargePercentage"},
+            {1, nullptr, "GetChargerType"},
+            {2, nullptr, "EnableBatteryCharging"},
+            {3, nullptr, "DisableBatteryCharging"},
+            {4, nullptr, "IsBatteryChargingEnabled"},
+            {5, nullptr, "AcquireControllerPowerSupply"},
+            {6, nullptr, "ReleaseControllerPowerSupply"},
+            {7, nullptr, "OpenSession"},
+            {8, nullptr, "EnableEnoughPowerChargeEmulation"},
+            {9, nullptr, "DisableEnoughPowerChargeEmulation"},
+            {10, nullptr, "EnableFastBatteryCharging"},
+            {11, nullptr, "DisableFastBatteryCharging"},
+            {12, nullptr, "GetBatteryVoltageState"},
+            {13, nullptr, "GetRawBatteryChargePercentage"},
+            {14, nullptr, "IsEnoughPowerSupplied"},
+            {15, nullptr, "GetBatteryAgePercentage"},
+            {16, nullptr, "GetBatteryChargeInfoEvent"},
+            {17, nullptr, "GetBatteryChargeInfoFields"},
+        };
+    // clang-format on
+
+    RegisterHandlers(functions);
+}
+
+PSM::~PSM() = default;
+
+void InstallInterfaces(SM::ServiceManager& sm) {
+    std::make_shared<PSM>()->InstallAsService(sm);
+}
+
+} // namespace Service::PSM