drm/i915/gvt: Constify intel_gvt_sched_policy_ops

These are never modified, so make them const to allow the compiler to
put them in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20211204105527.15741-5-rikard.falkeborn@gmail.comReviewed-by: Zhi Wang <zhi.a.wang@intel.com>

drivers/gpu/drm/i915/gvt/sched_policy.c

@@ -368,7 +368,7 @@ static void tbs_sched_stop_schedule(struct intel_vgpu *vgpu)
 	vgpu_data->active = false;
 }
 
-static struct intel_gvt_sched_policy_ops tbs_schedule_ops = {
+static const struct intel_gvt_sched_policy_ops tbs_schedule_ops = {
 	.init = tbs_sched_init,
 	.clean = tbs_sched_clean,
 	.init_vgpu = tbs_sched_init_vgpu,

drivers/gpu/drm/i915/gvt/scheduler.h

@@ -56,7 +56,7 @@ struct intel_gvt_workload_scheduler {
 	wait_queue_head_t waitq[I915_NUM_ENGINES];
 
 	void *sched_data;
-	struct intel_gvt_sched_policy_ops *sched_ops;
+	const struct intel_gvt_sched_policy_ops *sched_ops;
 };
 
 #define INDIRECT_CTX_ADDR_MASK 0xffffffc0