rs6000.h (USE_FP_FOR_ARG_P): Move to rs6000.c.

rs6000.h (USE_FP_FOR_ARG_P): Move to rs6000.c.

	* config/rs6000/rs6000.h (USE_FP_FOR_ARG_P): Move to rs6000.c.
	(USE_ALTIVEC_FOR_ARG_P): Likewise.
	* config/rs6000/rs6000.c (USE_FP_FOR_ARG_P): Move from rs6000.h.
	Take a pointer as the CUM parameter.  Update callers.
	(USE_ALTIVEC_FOR_ARG_P): Likewise.  Also correct for Darwin/AIX
	32-bit ABIs.
	(function_arg_advance): Use USE_ALTIVEC_FOR_ARG_P.  Correct case
	of vector parameters as named arguments of stdarg function.
	(function_arg): Likewise.

	* config/rs6000/darwin.h (ASM_SPEC): Use -force_cpusubtype_ALL when
	-maltivec is specified, not the non-existent -faltivec.

From-SVN: r73317