Kernel/riscv64: Make the kernel compile

This commits inserts TODOs into all necessary places to make the kernel
compile on riscv64!

Kernel/Arch/riscv64/InterruptManagement.cpp

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2023, Sönke Holz <sholz8530@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <Kernel/Arch/Interrupts.h>
+#include <Kernel/Arch/riscv64/IRQController.h>
+#include <Kernel/Arch/riscv64/InterruptManagement.h>
+#include <Kernel/Interrupts/SharedIRQHandler.h>
+
+namespace Kernel {
+
+static InterruptManagement* s_interrupt_management;
+
+bool InterruptManagement::initialized()
+{
+    return s_interrupt_management != nullptr;
+}
+
+InterruptManagement& InterruptManagement::the()
+{
+    VERIFY(InterruptManagement::initialized());
+    return *s_interrupt_management;
+}
+
+void InterruptManagement::initialize()
+{
+    VERIFY(!InterruptManagement::initialized());
+    s_interrupt_management = new InterruptManagement;
+
+    the().find_controllers();
+}
+
+void InterruptManagement::find_controllers()
+{
+    TODO_RISCV64();
+}
+
+u8 InterruptManagement::acquire_mapped_interrupt_number(u8)
+{
+    TODO_RISCV64();
+}
+
+Vector<NonnullLockRefPtr<IRQController>> const& InterruptManagement::controllers()
+{
+    return m_interrupt_controllers;
+}
+
+NonnullLockRefPtr<IRQController> InterruptManagement::get_responsible_irq_controller(size_t)
+{
+    TODO_RISCV64();
+}
+
+void InterruptManagement::enumerate_interrupt_handlers(Function<void(GenericInterruptHandler&)>)
+{
+    TODO_RISCV64();
+}
+
+}