Add mach parameter to nios2_find_opcode_hash.

Add mach parameter to nios2_find_opcode_hash.

2014-11-06  Sandra Loosemore  <sandra@codesourcery.com>

	include/opcode/
	* nios2.h (nios2_find_opcode_hash): Add mach parameter to
	declaration.  Fix obsolete comment.

	opcodes/
	* nios2-dis.c (nios2_find_opcode_hash): Add mach parameter.
	(nios2_disassemble): Adjust call to nios2_find_opcode_hash.

	gas/
	* config/tc-nios2.c (nios2_diagnose_overflow): Adjust call to
	nios2_find_opcode_hash.