HID: alps: a few cleanups

Remove an unnecessary codes.
Change input_ivent() function to appropriate function.
Add the device ID of "HID_DEVICE_ID_ALPS_U1_DUAL".

[jkosina@suse.cz: removed unnecessary bitshifts of values passed
 input_report_key() as spotted by Dmitry]
Signed-off-by: Masaki Ota <masaki.ota@jp.alps.com>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index a5a429c..c4f665d 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -71,6 +71,7 @@
 #define USB_DEVICE_ID_IBM_GAMEPAD	0x1101
 
 #define USB_VENDOR_ID_ALPS_JP		0x044E
+#define HID_DEVICE_ID_ALPS_U1_DUAL	0x120B
 
 #define USB_VENDOR_ID_ANTON		0x1130
 #define USB_DEVICE_ID_ANTON_TOUCH_PAD	0x3101