HID: wiimote: Add extension handler stubs

All supported extensions report data as 6 byte block. All DRMs with extension
data provide at least 6 extension bytes. Hence a generic handler for all
extension bytes is sufficient and can be called on all DRMs.

The handler distinguishes the input and passes it to the right handler. Motion+
passes data interleaved so we can have Motion+ and a regular extension enabled
simultaneously.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-wiimote-core.c b/drivers/hid/hid-wiimote-core.c
index 2ca8bfd..d8ed1ec 100644
--- a/drivers/hid/hid-wiimote-core.c
+++ b/drivers/hid/hid-wiimote-core.c
@@ -857,6 +857,7 @@
 static void handler_drm_KE(struct wiimote_data *wdata, const __u8 *payload)
 {
 	handler_keys(wdata, payload);
+	wiiext_handle(wdata, &payload[2]);
 }
 
 static void handler_drm_KAI(struct wiimote_data *wdata, const __u8 *payload)
@@ -873,6 +874,7 @@
 static void handler_drm_KEE(struct wiimote_data *wdata, const __u8 *payload)
 {
 	handler_keys(wdata, payload);
+	wiiext_handle(wdata, &payload[2]);
 }
 
 static void handler_drm_KIE(struct wiimote_data *wdata, const __u8 *payload)
@@ -883,12 +885,14 @@
 	ir_to_input2(wdata, &payload[7], false);
 	ir_to_input3(wdata, &payload[9], true);
 	input_sync(wdata->ir);
+	wiiext_handle(wdata, &payload[12]);
 }
 
 static void handler_drm_KAE(struct wiimote_data *wdata, const __u8 *payload)
 {
 	handler_keys(wdata, payload);
 	handler_accel(wdata, payload);
+	wiiext_handle(wdata, &payload[5]);
 }
 
 static void handler_drm_KAIE(struct wiimote_data *wdata, const __u8 *payload)
@@ -900,10 +904,12 @@
 	ir_to_input2(wdata, &payload[10], false);
 	ir_to_input3(wdata, &payload[12], true);
 	input_sync(wdata->ir);
+	wiiext_handle(wdata, &payload[15]);
 }
 
 static void handler_drm_E(struct wiimote_data *wdata, const __u8 *payload)
 {
+	wiiext_handle(wdata, payload);
 }
 
 static void handler_drm_SKAI1(struct wiimote_data *wdata, const __u8 *payload)