drm/i915: Avoid early timeout during AUX transfers

drm/i915: Avoid early timeout during AUX transfers

Since wait_for_atomic doesn't re-check the wait-for condition after
expiry of the timeout it can fail when called from non-atomic context
even if the condition is set correctly before the expiry. Fix this by
using the non-atomic wait_for instead.

Due to the relatively long 10ms timeout, probably this didn't cause any
real problems, but fix it in any case for consistency.

Fixes: 0351b93992aa ("drm/i915: Do not lie about atomic timeout granularity")
CC: Chris Wilson <[email protected]>
CC: Tvrtko Ursulin <[email protected]>
Signed-off-by: Imre Deak <[email protected]>
Reviewed-by: Tvrtko Ursulin <[email protected]>
CC: [email protected]
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 713a6b668932213247b394559bc229cd0fec2777)
Signed-off-by: Jani Nikula <[email protected]>