xtensa.h (PREFERRED_RELOAD_CLASS, [...]): Remove.

	* config/xtensa/xtensa.h (PREFERRED_RELOAD_CLASS,
	PREFERRED_OUTPUT_RELOAD_CLASS): Remove.
	* config/xtensa/xtensa-protos.h (xtensa_preferred_reload_class,
	secondary_reload_info, xtensa_secondary_reload): Remove.
	* config/xtensa/xtensa.c (TARGET_PREFERRED_RELOAD_CLASS,
	TARGET_PREFERRED_OUTPUT_RELOAD_CLASS): Define.
	(xtensa_preferred_reload_class): Make static. Change return and
	'rclass' argument type to reg_class_t. Remove 'isoutput' argument.
	Use CONST_DOUBLE_P predicate.
	(xtensa_preferred_output_reload_class): New function.
	(xtensa_secondary_reload): Make static.

From-SVN: r169810