HID: logitech-hidpp: Add scope to battery

Without a scope defined, UPower assumes that the battery provides
power to the computer it's connected to, like a laptop battery or a UPS.
Tested-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-logitech-hidpp.c

@@ -761,6 +761,7 @@ static int hidpp20_battery_event(struct hidpp_device *hidpp,
 static enum power_supply_property hidpp_battery_props[] = {
 	POWER_SUPPLY_PROP_STATUS,
 	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_SCOPE,
 };
 
 static int hidpp_battery_get_property(struct power_supply *psy,
@@ -777,6 +778,9 @@ static int hidpp_battery_get_property(struct power_supply *psy,
 		case POWER_SUPPLY_PROP_CAPACITY:
 			val->intval = hidpp->battery.level;
 			break;
+		case POWER_SUPPLY_PROP_SCOPE:
+			val->intval = POWER_SUPPLY_SCOPE_DEVICE;
+			break;
 		default:
 			ret = -EINVAL;
 			break;