dmaengine: idxd: Delete unnecessary NULL check

The "saved_evl" pointer is a offset into the middle of a non-NULL struct.
It can't be NULL and the check is slightly confusing.  Delete the check.

Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Link: https://lore.kernel.org/r/ec38214e-0bbb-4c5a-94ff-b2b2d4c3f245@stanley.mountain
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: Dan Carpenter

drivers/dma/idxd/init.c

@@ -912,8 +912,7 @@ static void idxd_device_config_restore(struct idxd_device *idxd,
 
 	idxd->rdbuf_limit = idxd_saved->saved_idxd.rdbuf_limit;
 
-	if (saved_evl)
-		idxd->evl->size = saved_evl->size;
+	idxd->evl->size = saved_evl->size;
 
 	for (i = 0; i < idxd->max_groups; i++) {
 		struct idxd_group *saved_group, *group;