* 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.