This allows compiling the program using musl-libc, since otherwise iopl(2) is undeclared. Change-Id: Ia27203cf47b9be3f7bf1ad422c8f490caeae8f56 Signed-off-by: Ivan J. <parazyd@dyne.org> Reviewed-on: https://review.coreboot.org/23834 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>