b21e55bfb9
Clang disallows ambiguous instructions (GNU as has a default based on chosen .code setting). We only need 'orb' here because KARGS_FLAGS_PXE fits in a byte; this is the same as done in bxeboot. Reviewed by: kib Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D8959