make stormy16 use constraints.md
	* config/stormy16/constraints.md: New file.
	* config/stormy16/predicates.md (nonimmediate_nonstack_operand):
	Use satisfies_constraint_Q and satisfies_constraint_R.
	* config/stormy16/stomry16-protos.h (xstormy16_extra_constraint_p):
	Delete.
	(xstormy16_legitiamte_address_p): Declare.
	* config/stormy16/stormy16.h (REG_CLASS_FROM_LETTER): Delete.
	(CONST_OK_FOR_LETTER_P, CONST_DOUBLE_OK_FOR_LETTER_P): Delete.
	(EXTRA_CONSTRAINT): Delete.
	* config/stormy16/stormy16.c (xstormy16_legitiamte_address_p):
	Un-staticize.
	(xstormy16_extra_constraint_p): Delete.

From-SVN: r170152