power_supply: add "powers" links to self-powered HID devices

Make the relationship between the Wiimote and Wacom self-powered HID
devices and their power supply explicit by adding a "powers" link.

Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index ad39777..3d28e49 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -397,6 +397,8 @@
 	wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY;
 	wdata->battery.use_for_apm = 0;
 
+	power_supply_powers(&wdata->battery, &hdev->dev);
+
 	ret = power_supply_register(&hdev->dev, &wdata->battery);
 	if (ret) {
 		hid_warn(hdev, "can't create sysfs battery attribute, err: %d\n",
@@ -411,6 +413,8 @@
 	wdata->ac.type = POWER_SUPPLY_TYPE_MAINS;
 	wdata->ac.use_for_apm = 0;
 
+	power_supply_powers(&wdata->battery, &hdev->dev);
+
 	ret = power_supply_register(&hdev->dev, &wdata->ac);
 	if (ret) {
 		hid_warn(hdev,
diff --git a/drivers/hid/hid-wiimote.c b/drivers/hid/hid-wiimote.c
index 98e4828..fc0b4db 100644
--- a/drivers/hid/hid-wiimote.c
+++ b/drivers/hid/hid-wiimote.c
@@ -1263,6 +1263,8 @@
 	wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY;
 	wdata->battery.use_for_apm = 0;
 
+	power_supply_powers(&wdata->battery, &hdev->dev);
+
 	ret = power_supply_register(&wdata->hdev->dev, &wdata->battery);
 	if (ret) {
 		hid_err(hdev, "Cannot register battery device\n");