This is partial revert of commit 9404c9c392d5 ("Fix misspelling of "should"
and "shouldn't" in comments"). According to Dave Airlie:

	"Can we drop any cleanups to atombios.h? This file comes from
	AMD and we normally drop it into place, so they just get overwritten
	next time."
Reported-by: NDave Airlie <airlied@linux.ie>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>