avr.c (initial_elimination_offset): Rename to avr_initial_elimination_offset.

avr.c (initial_elimination_offset): Rename to avr_initial_elimination_offset.

	* config/avr/avr.c (initial_elimination_offset): Rename to
	avr_initial_elimination_offset.
	(frame_pointer_required_p): Rename to avr_frame_pointer_required_p,
	change return type to bool.
	(avr_can_eliminate): New function.
	* config/avr/avr.h (CAN_ELIMINATE): Use avr_can_eliminate.
	(FRAME_POINTER_REQUIRED): Use avr_frame_pointer_required_p.
	(INITIAL_ELIMINATION_OFFSET): Use avr_initial_elimination_offset.
	* config/avr/avr-protos.h (initial_elimination_offset) : Rename to
	avr_initial_elimination_offset.
	(frame_pointer_required_p): Rename to avr_frame_pointer_required_p.
	(avr_initial_elimination_offset): Define.

From-SVN: r146989