Kernel: Implement PCI interrupt routing

This does not really work but I have no idea what I'm doing wrong

kernel/include/kernel/PCI.h

@@ -2,6 +2,7 @@
 
 #include <BAN/UniqPtr.h>
 #include <BAN/Vector.h>
+#include <kernel/ACPI/AML/Node.h>
 #include <kernel/Memory/Types.h>
 #include <kernel/Storage/StorageController.h>
 
@@ -119,6 +120,9 @@ namespace Kernel::PCI
 		void enable_pin_interrupts();
 		void disable_pin_interrupts();
 
+		BAN::ErrorOr<uint8_t> route_prt_entry(const ACPI::AML::Node& routing_entry);
+		BAN::ErrorOr<uint8_t> find_intx_interrupt();
+
 	private:
 		bool m_is_valid	{ false };
 		uint8_t m_bus	{ 0 };