Make more use of end_hard_regno

Make more use of end_hard_regno

An upcoming patch will convert hard_regno_nregs into an inline
function, which in turn allows hard_regno_nregs to be used as the
name of a targetm field.  This patch rewrites uses that can use
end_hard_regno instead.

2017-09-12  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	* config/aarch64/aarch64.c (aarch64_hard_regno_mode_ok): Use
	end_hard_regno instead of hard_regno_nregs.
	* config/s390/s390.c (s390_reg_clobbered_rtx): Likewise.
	* config/sparc/sparc.h (ASM_DECLARE_REGISTER_GLOBAL): Likewise.
	* config/visium/visium.c (visium_hard_regno_mode_ok): Likewise.
	* ira-color.c (improve_allocation): Likewise.
	* lra-assigns.c (find_hard_regno_for_1): Likewise.
	* lra-lives.c (mark_regno_live): Likewise.
	(mark_regno_dead): Likewise.
	* lra-remat.c (operand_to_remat): Likewise.
	* lra.c (collect_non_operand_hard_regs): Likewise.
	* postreload.c (reload_combine_note_store): Likewise.
	(move2add_valid_value_p): Likewise.
	* reload.c (regno_clobbered_p): Likewise.

From-SVN: r252012