sys/linker.h needs sys/queue.h; this gets another wireless driver closer to compiling on main. MFC after: 3 days
MFC after: 1 week Reviewed by: bz, emaste, hselasky, manu Differential Revision: https://reviews.freebsd.org/D33562
efi_enabled(EFI_BOOT) returns true if machine was booted from EFI Used by drm-kmod and some unported drm drivers like hyperv MFC after: 1 week Reviewed by: hselasky, manu Differential Revision: https://reviews.freebsd.org/D33300