Fixed Linux MS/TP 76800 bitrate for Linux 2.6.20+ circa 2007 and added get/set API for config. (#1007)

ports/linux/termios2.h

@@ -0,0 +1,25 @@
+#ifndef TERMIOS2_H
+#define TERMIOS2_H
+
+#define termios asmtermios /*avoid conflicts with others including termios.h*/
+#include <asm/termbits.h>
+#undef termios
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+int termios2_tcsetattr(
+    int fildes, int optional_actions, const struct termios2 *termios2_p);
+
+int termios2_tcgetattr(int fildes, struct termios2 *termios2_p);
+
+int termios2_tcflush(int fildes, int queue_selector);
+
+int termios2_tcdrain(int fildes);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif