pmdomain: thead: create auxiliary device for rebooting

The reboot / power off operations require communication with the AON
firmware too.

As the driver is already present, create an auxiliary device with name
"reboot" to match that driver, and pass the AON channel by using
platform_data.

Signed-off-by: Icenowy Zheng <[e-mail]>
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/pmdomain/thead/th1520-pm-domains.c

···
 					adev);
 }
 
+static int th1520_pd_reboot_init(struct device *dev,
+				 struct th1520_aon_chan *aon_chan)
+{
+	struct auxiliary_device *adev;
+
+	adev = devm_auxiliary_device_create(dev, "reboot", aon_chan);
+
+	return PTR_ERR_OR_ZERO(adev);
+}
+
 static int th1520_pd_probe(struct platform_device *pdev)
 {
 	struct generic_pm_domain **domains;
···
 		goto err_clean_genpd;
 
 	ret = th1520_pd_pwrseq_gpu_init(dev);
+	if (ret)
+		goto err_clean_provider;
+
+	ret = th1520_pd_reboot_init(dev, aon_chan);
 	if (ret)
 		goto err_clean_provider;