xtensa-protos.h (function_arg_advance): Delete.

xtensa-protos.h (function_arg_advance): Delete.

	* config/xtensa/xtensa-protos.h (function_arg_advance): Delete.
	(function_arg): Delete.
	* config/xtensa/xtensa.h (FUNCTION_ARG, FUNCTION_ARG_ADVANCE): Delete.
	(FUNCTION_INCOMING_ARG): Delete.
	* config/xtensa/xtensa.c (function_arg_advance): Rename to...
	(xtensa_function_arg_advance): ...this.  Make static.  Take a const_tree
	and a bool.
	(function_arg): Rename to...
	(xtensa_function_arg_1): ...this.  Make static.  Take a const_tree and
	a bool.
	(xtensa_function_arg, xtensa_function_incoming_arg): Nex functions.
	(TARGET_FUNCTION_ARG, TARGET_FUNCTION_ARG_ADVANCE): Define.
	(TARGET_FUNCTION_INCOMING_ARG): Define.

From-SVN: r163649