intel: Fix missing ETIME on BSD operating systems

Originally posted to Free Desktop bug #52549 by David Shao.
Resolves Gentoo Bug #433403.
Commit message by Richard Yao.

Reviewed-by: Richard Yao <ryao@gentoo.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
References: https://bugs.freedesktop.org/show_bug.cgi?id=52549



Signed-off-by: Ben Widawsky <ben@bwidawsk.net>