opcodes: blackfin: add multiple inclusion protection

Prevent build errors if the header happens to be included multiple times.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

include/opcode/ChangeLog

@@ -1,3 +1,7 @@
+2011-02-11  Mike Frysinger  <vapier@gentoo.org>
+
+	* bfin.h: Add OPCODE_BFIN_H ifdef multiple include protection.
+
 2011-02-04  Bernd Schmidt  <bernds@codesourcery.com>
 
 	* tic6x-opcode-table.h (cmtl, ll, sl): Available on C64XP.

include/opcode/bfin.h

@@ -1,5 +1,5 @@
 /* bfin.h -- Header file for ADI Blackfin opcode table
-   Copyright 2005, 2010 Free Software Foundation, Inc.
+   Copyright 2005, 2010, 2011 Free Software Foundation, Inc.
 
    This file is part of GDB, GAS, and the GNU binutils.
 
@@ -18,6 +18,9 @@
    Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
    MA 02110-1301, USA.  */
 
+#ifndef OPCODE_BFIN_H
+#define OPCODE_BFIN_H
+
 /* Common to all DSP32 instructions.  */
 #define BIT_MULTI_INS 0x0800
 
@@ -1725,3 +1728,5 @@ typedef struct
   DagMODik_op_bits,	DagMODik_op_mask,	\
   DagMODik_code_bits,	DagMODik_code_mask	\
 };
+
+#endif