AArch64: Fix SME builtins macro cleanups The macros introduced in the .def file should all be undef at the end to prevent overlap with the next .def file being included. The DEF_SME_FUNCTION_GS macro was missing an undef. gcc/ChangeLog: * config/aarch64/aarch64-sve-builtins-sme.def (DEF_SME_FUNCTION_GS): Undef at end.