* expr.h (DEFAULT_FUNCTION_ARG_PADDING): New.
	(FUNCTION_ARG_PADDING): Use DEFAULT_FUNCTION_ARG_PADDING.
	* config/ia64/ia64.c (ia64_hpux_function_arg_padding):
	Likewise.
	* config/m68hc11/m68hc11.c (m68hc11_function_arg_padding):
	Likewise.
	* config/rs6000/rs6000.c (function_arg_padding): Likewise.
	* config/sparc/sparc.c (function_arg_padding): Likewise.

From-SVN: r71406