[Kernel] Use tables for export groups.

src/xenia/kernel/xam/xam_party.cc

@@ -40,8 +40,8 @@ dword_result_t XamPartyGetBandwidth_entry(dword_t r3, dword_t r4) {
 }
 DECLARE_XAM_EXPORT1(XamPartyGetBandwidth, kNone, kStub);
 
-void RegisterPartyExports(xe::cpu::ExportResolver* export_resolver,
-                          KernelState* kernel_state) {}
 }  // namespace xam
 }  // namespace kernel
 }  // namespace xe
+
+DECLARE_XAM_EMPTY_REGISTER_EXPORTS(Party);