Modify DALI_KEY_H to DALI_KEYCODE_H
Modify DALI_KEY_H to DALI_KEYCODE_H

keyword 'DALI_KEY_H' is aleady used in VD key-extension.

Change-Id: Ia037d9a6a7dbe243302b52419e9757c5339d9179

dalihub/dali-adaptor,dalihub/dali-adaptor,dalihub/dali-adaptor,dalihub/dali-adaptor,dalihub/dali-adaptor