m68k-protos.h: Add a prototype for valid_dbcc_comparison_p_2.

	* config/m68k/m68k-protos.h: Add a prototype for
	valid_dbcc_comparison_p_2.
	* config/m68k/m68k.c (not_sp_operand, symbolic_operand,
	extend_operator, const_uint32_operand, const_sint32_operand,
	general_src_operand, nonimmediate_src_operand,
	memory_src_operand, post_inc_operand, pre_dec_operand,
	pcrel_address): Move to predicates to predicates.md.
	* config/m68k/m68k.h (PREDICATE_CODES): Remove.
	* config/m68k/m68k.md: Include predicates.md.
	* config/m68k/predicates.md: New.

From-SVN: r97595