reload1.c: Include rtl-iter.h.

reload1.c: Include rtl-iter.h.

gcc/
	* reload1.c: Include rtl-iter.h.
	(note_reg_elim_costly): Turn from being a for_each_rtx callback
	to being a function that examines each subrtx itself.
	(eliminate_regs_1, elimination_costs_in_insn): Update accordingly.

From-SVN: r214653