drm/radeon/kms: Silent spurious error message

I see the following error message in my kernel log from time to time:
radeon 0000:07:00.0: ffff88007c334000 reserve failed for wait
radeon 0000:07:00.0: ffff88007c334000 reserve failed for wait

After investigation, it turns out that there's nothing to be afraid of
and everything works as intended. So remove the spurious log message.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Reviewed-by: NJerome Glisse <jglisse@redhat.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_object.h

@@ -124,11 +124,8 @@ static inline int radeon_bo_wait(struct radeon_bo *bo, u32 *mem_type,
 	int r;
 
 	r = ttm_bo_reserve(&bo->tbo, true, no_wait, false, 0);
-	if (unlikely(r != 0)) {
-		if (r != -ERESTARTSYS)
-			dev_err(bo->rdev->dev, "%p reserve failed for wait\n", bo);
+	if (unlikely(r != 0))
 		return r;
-	}
 	spin_lock(&bo->tbo.lock);
 	if (mem_type)
 		*mem_type = bo->tbo.mem.mem_type;