rtl8723ds: Initial commit of files

This repository contains the Realtek driver V5.1.1.5_20523.20161209_BTCOEX20161208-1212.

At inclusion, the only changes from the Realtek version were to fix any compile
warnings or errors. With these changes, the driver builds on kernels through
4.11.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>

include/circ_buf.h

@@ -0,0 +1,28 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
+ *                                        
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ *
+ ******************************************************************************/
+#ifndef __CIRC_BUF_H_
+#define __CIRC_BUF_H_ 1
+
+#define CIRC_CNT(head,tail,size) (((head) - (tail)) & ((size)-1))
+
+#define CIRC_SPACE(head,tail,size) CIRC_CNT((tail),((head)+1),(size))
+
+#endif //_CIRC_BUF_H_
+