re PR libffi/60073 (64-bit libffi.call/cls_double_va.c FAILs after recent modification)

re PR libffi/60073 (64-bit libffi.call/cls_double_va.c FAILs after recent modification)

	PR libffi/60073
	* src/sparc/ffitarget.h (FFI_TARGET_SPECIFIC_VARIADIC): Define.
	(FFI_EXTRA_CIF_FIELDS): Likewise.
	(FFI_NATIVE_RAW_API): Move around.
	* src/sparc/ffi.c (ffi_prep_cif_machdep_core): New function from...
	(ffi_prep_cif_machdep): ...here.  Call ffi_prep_cif_machdep_core.
	(ffi_prep_cif_machdep_var): New function.
	(ffi_closure_sparc_inner_v9): Do not pass anonymous FP arguments in
	FP registers.
	* doc/libffi.texi (Introduction): Fix inaccuracy.

From-SVN: r207763