gpio: add (most of) driver framework for boot sysmodule usage

libraries/libstratosphere/source/gpio/driver/gpio_driver_client_api.cpp

@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+
+#include "impl/gpio_driver_core.hpp"
+
+namespace ams::gpio::driver {
+
+    void Initialize() {
+        return impl::InitializeDrivers();
+    }
+
+    void Finalize() {
+        return impl::FinalizeDrivers();
+    }
+
+}