drm/syncobj: Fix compilation following partial revert

We need to include the revert of commit 783195ec ("drm/syncobj:
disable the timeline UAPI for now v2") along with undoing the change to
drm/i915.

Fixes: 131280a1 ("drm: Revert syncobj timeline changes.")
Cc: Christian König <christian.koenig@amd.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Chunming Zhou <david1.zhou@amd.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20181112152130.12275-1-chris@chris-wilson.co.uk

drivers/gpu/drm/drm_syncobj.c

@@ -277,10 +277,6 @@ int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags,
 	int ret;
 	struct drm_syncobj *syncobj;
 
-	/* Disabled for now */
-	if (flags & DRM_SYNCOBJ_CREATE_TYPE_TIMELINE)
-		return -EINVAL;
-
 	syncobj = kzalloc(sizeof(struct drm_syncobj), GFP_KERNEL);
 	if (!syncobj)
 		return -ENOMEM;

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -2157,7 +2157,7 @@ await_fence_array(struct i915_execbuffer *eb,
 		if (!(flags & I915_EXEC_FENCE_WAIT))
 			continue;
 
-		drm_syncobj_search_fence(syncobj, 0, 0, &fence);
+		fence = drm_syncobj_fence_get(syncobj);
 		if (!fence)
 			return -EINVAL;