drm/i915: mdelay(10) considered harmful

drm/i915: mdelay(10) considered harmful

I missed this myself when reviewing

commit 237ed86c693d8a8e4db476976aeb30df4deac74b
Author: Sonika Jindal <[email protected]>
Date:   Tue Sep 15 09:44:20 2015 +0530

    drm/i915: Check live status before reading edid

Long sleeps like this really shouldn't waste cpu cycles spinning.

Cc: Sonika Jindal <[email protected]>
Cc: "Wang, Gary C" <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Sonika Jindal <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
(cherry picked from commit 71a199bacb398ee54eeac001699257dda083a455)
Signed-off-by: Jani Nikula <[email protected]>