HID: wacom: actually report the battery level for wireless connected

Since fd5f92b6 ("HID: wacom: reuse wacom_parse_and_register() in
wireless_work"), wacom->shared->type is not set.
Send the information of the battery if we have one.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/wacom_wac.c

@@ -2125,6 +2125,7 @@ static int wacom_bamboo_pad_irq(struct wacom_wac *wacom, size_t len)
 
 static int wacom_wireless_irq(struct wacom_wac *wacom, size_t len)
 {
+	struct wacom *w = container_of(wacom, struct wacom, wacom_wac);
 	unsigned char *data = wacom->data;
 	int connected;
 
@@ -2152,7 +2153,7 @@ static int wacom_wireless_irq(struct wacom_wac *wacom, size_t len)
 			wacom_schedule_work(wacom);
 		}
 
-		if (wacom->shared->type)
+		if (w->battery)
 			wacom_notify_battery(wacom, battery, charging, 1, 0);
 
 	} else if (wacom->pid != 0) {