[PATCH/AARCH64] Add rtx_costs routine for vulcan.

[PATCH/AARCH64] Add rtx_costs routine for vulcan.

gcc/ChangeLog:

2016-07-15  Virendra Pathak  <virendra.pathak@broadcom.com>
	    Julian Brown  <julian@codesourcery.com>

	* config/aarch64/aarch64-cores.def: Update vulcan COSTS.
	* config/aarch64/aarch64-cost-tables.h
	(vulcan_extra_costs): New variable.
	* config/aarch64/aarch64.c
	(vulcan_addrcost_table): Likewise.
	(vulcan_regmove_cost): Likewise.
	(vulcan_vector_cost): Likewise.
	(vulcan_branch_cost): Likewise.
	(vulcan_tunings): Likewise.

Co-Authored-By: Julian Brown <julian@codesourcery.com>
From-SVN: r238372