mips32: Added CP0 coprocessor R/W routines

This patch adds MIPS32 CP0 coprocessor R/W routines,
as well as adequate commands to use these routines via
telnet interface.

Now is becomes possible to affect CP0 internal registers
and configure CPU directly from OpenOCD.

src/target/mips_m4k.h

@@ -4,6 +4,9 @@
  *                                                                         *
  *   Copyright (C) 2008 by David T.L. Wong                                 *
  *                                                                         *
+ *   Copyright (C) 2011 by Drasko DRASKOVIC                                *
+ *   drasko.draskovic@gmail.com                                            *
+ *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
@@ -43,4 +46,6 @@ target_to_m4k(struct target *target)
 			struct mips_m4k_common, mips32);
 }
 
+extern const struct command_registration mips_m4k_command_handlers[];
+
 #endif	/*MIPS_M4K_H*/