Remove incorrect ATTRIBUTE_UNUSED from nios2 bfd

Remove incorrect ATTRIBUTE_UNUSED from nios2 bfd

2013-11-03  Sandra Loosemore  <sandra@codesourcery.com>

	bfd/
	* elf32-niso2.c (nios2_elf32_do_hi16_relocate): Remove incorrect
	ATTRIBUTE_UNUSED from parameter.
	(nios2_elf_do_lo16_relocate): Likewise.
	(nios2_elf32_do_hiadj16_relocate): Likewise.
	(nios2_elf32_do_pcrel_lo16_relocate): Likewise.
	(nios2_elf32_do_pcrel_hiadj16_relocate): Likewise.
	(nios2_elf32_do_pcrel16_relocate): Likewise.
	(nios2_elf32_do_call26_relocate): Likewise.
	(nios2_elf32_do_gprel_relocate): Likewise.
	(nios2_elf32_do_ujmp_relocate): Likewise.
	(nios2_elf32_do_cjmp_relocate): Likewise.
	(nios2_elf32_do_callr_relocate): Likewise.
	(nios2_elf32_gc_mark_hook): Likewise.