h8300-protos.h: Add prototypes for const_int_qi_operand and const_int_hi_operand.

	* config/h8300/h8300-protos.h: Add prototypes for
	const_int_qi_operand and const_int_hi_operand.
	* config/h8300/h8300.c (const_int_qi_operand): New.
	(const_int_hi_operand): Likewise.
	* config/h8300/h8300.md (three peepholes): New.

From-SVN: r60600