[Kernel] Use tables for export groups.

src/xenia/kernel/xboxkrnl/xboxkrnl_debug.cc

@@ -154,9 +154,8 @@ DECLARE_XBOXKRNL_EXPORT2(KeBugCheckEx, kDebug, kStub, kImportant);
 void KeBugCheck_entry(dword_t code) { KeBugCheckEx_entry(code, 0, 0, 0, 0); }
 DECLARE_XBOXKRNL_EXPORT2(KeBugCheck, kDebug, kImplemented, kImportant);
 
-void RegisterDebugExports(xe::cpu::ExportResolver* export_resolver,
-                          KernelState* kernel_state) {}
-
 }  // namespace xboxkrnl
 }  // namespace kernel
 }  // namespace xe
+
+DECLARE_XBOXKRNL_EMPTY_REGISTER_EXPORTS(Debug);