Merge pull request #173 from tomaspinho/add-license

Add License based on original files

COPYING

@@ -0,0 +1,15 @@
+/******************************************************************************
+*
+* Copyright(c) 2012 - 2020 Realtek Corporation.
+* Copyright(c) 2018 - 2020 Maintenance by Tomás Pinho and other contributors in GitHub project.
+*
+* This program is free software; you can redistribute it and/or modify it
+* under the terms of version 2 of the GNU General Public License as
+* published by the Free Software Foundation.
+*
+* This program is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+* more details.
+*
+******************************************************************************/