frv-protos.h: Remove the prototype for frv_expand_builtin_saveregs.

	* config/frv/frv-protos.h: Remove the prototype for
	frv_expand_builtin_saveregs.
	* config/frv/frv.c (TARGET_STRUCT_VALUE_RTX): Likewise.
	(TARGET_EXPAND_BUILTIN_SAVEREGS): Likewise.
	(frv_stack_info): Use FRV_STRUCT_VALUE_REGNUM instead of
	STRUCT_VALUE_REGNUM.
	(frv_expand_builtin_saveregs): Make it static.
	(frv_struct_value_rtx): New.
	* config/frv/frv.h (EXPAND_BUILTIN_SAVEREGS): Remove.

From-SVN: r76826