gcc/
	* config/nds32/nds32.c (nds32_rtx_costs): Move implementation to ...
	(nds32_address_cost): Move implementation to ...
	* config/nds32/nds32-cost.c: ... here.
	* config/nds32/nds32-protos.h (nds32_rtx_costs_impl): Declare.
	(nds32_address_cost_impl): Declare.

Co-Authored-By: Kito Cheng <kito@0xlab.org>
Co-Authored-By: Monk Chiang <sh.chiang04@gmail.com>

From-SVN: r212284