nvptx.c (nvptx_function_arg, [...]): Move earlier.

nvptx.c (nvptx_function_arg, [...]): Move earlier.

	* config/nvptx/nvptx.c (nvptx_function_arg,
	nvptx_function_incoming_arg, nvptx_function_arg_advance,
	nvptx_strict_argument_naming, nvptx_function_arg_boundary,
	nvptx_libcall_value, nvptx_function_value,
	nvptx_function_value_regno_p, nvptx_pass_by_reference,
	nvptx_return_in_memory, nvptx_promote_function_mode,
	nvptx_static_chain): Move earlier.
	(write_one_arg): Break out as helper fn for ...
	(write_arg): ... this new function.  Adjust all callers.

From-SVN: r231543