invoke.texi (AARCH64/mtune): Document thunderx as an available option also.

invoke.texi (AARCH64/mtune): Document thunderx as an available option also.

2014-10-21  Andrew Pinski  <apinski@cavium.com>

	* doc/invoke.texi (AARCH64/mtune): Document thunderx as an
	available option also.
	* config/aarch64/aarch64-cost-tables.h: New file.
	* config/aarch64/aarch64-cores.def (thunderx): New core.
	* config/aarch64/aarch64-tune.md: Regenerate.
	* config/aarch64/aarch64.c: Include aarch64-cost-tables.h instead
	of config/arm/aarch-cost-tables.h.
	(thunderx_regmove_cost): New variable.
	(thunderx_tunings): New variable.

From-SVN: r216524