h8300-protos.h: Update the prototype for split_adds_subs.

	* config/h8300/h8300-protos.h: Update the prototype for
	split_adds_subs.  Remove the prototypes for
	const_int_le_2_operand and const_int_le_6_operand.
	* config/h8300/h8300.c (split_adds_sub): Don't output inc/dec.
	(const_int_le_2_operand): Remove.
	(const_int_le_6_operand): Likewise.
	* config/h8300/h8300.h (PREDICATE_CODES): Remove the entries
	for const_int_le_2_operand and const_int_le_6_operand.
	* config/h8300/h8300.md: Update all uses of split_adds_subs.
	(a peephole2): New.

From-SVN: r63103