[Kernel] Use tables for export groups.

src/xenia/kernel/xboxkrnl/xboxkrnl_hid.cc

@@ -32,9 +32,8 @@ dword_result_t HidReadKeys_entry(dword_t unk1, unknown_t unk2, unknown_t unk3) {
 }
 DECLARE_XBOXKRNL_EXPORT1(HidReadKeys, kInput, kStub);
 
-void RegisterHidExports(xe::cpu::ExportResolver* export_resolver,
-                        KernelState* kernel_state) {}
-
 }  // namespace xboxkrnl
 }  // namespace kernel
 }  // namespace xe
+
+DECLARE_XBOXKRNL_EMPTY_REGISTER_EXPORTS(Hid);