HID: wiimote: convert BATTERY to module

This introduces a new sub-device module for the BATTERY handlers. It
moves the whole power_supply battery handling over to wiimote-modules.

This doesn't change any semantics or ABI but only converts the battery
handling into a sub-device module.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-wiimote.h b/drivers/hid/hid-wiimote.h
index 93c48fb..4151514 100644
--- a/drivers/hid/hid-wiimote.h
+++ b/drivers/hid/hid-wiimote.h
@@ -128,6 +128,7 @@
 enum wiimod_module {
 	WIIMOD_KEYS,
 	WIIMOD_RUMBLE,
+	WIIMOD_BATTERY,
 	WIIMOD_NUM,
 	WIIMOD_NULL = WIIMOD_NUM,
 };
@@ -184,6 +185,7 @@
 
 extern void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm);
 extern void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble);
+extern void wiiproto_req_status(struct wiimote_data *wdata);
 extern int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
 						const __u8 *wmem, __u8 size);
 extern ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset,