drm/panfrost: Use delayed timer as default in devfreq profile

Devfreq framework supports 2 modes for monitoring devices.
Use delayed timer as default instead of deferrable timer
in order to monitor the GPU status regardless of CPU idle.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210105164111.30122-1-lukasz.luba@arm.com

drivers/gpu/drm/panfrost/panfrost_devfreq.c

@@ -76,6 +76,7 @@ static int panfrost_devfreq_get_dev_status(struct device *dev,
 }
 
 static struct devfreq_dev_profile panfrost_devfreq_profile = {
+	.timer = DEVFREQ_TIMER_DELAYED,
 	.polling_ms = 50, /* ~3 frames */
 	.target = panfrost_devfreq_target,
 	.get_dev_status = panfrost_devfreq_get_dev_status,