devel/onetbb: fix build on powerpc

/wrkdirs/usr/ports/devel/onetbb/work/oneTBB-2021.2.0/src/tbb/tools_api/ittnotify_config.h:338:12: error: use of undeclared identifier '__TBB_machine_fetchadd4'

return __TBB_machine_fetchadd4(ptr, 1) + 1L;

Patch taken from https://github.com/oneapi-src/oneTBB/issues/186.