* elxsi.c: Include "hard-reg-set.h" and/or don't declare
	`call_used_regs' explicitly.
	* i860.c: Likewise.
	* m68k.c: Likewise.
	* ns32k.c: Likewise.
	* pa.c: Likewise.
	* vax.c: Likewise.
	* we32k.c: Likewise.

From-SVN: r48276