PR libffi/60073
	* src/sparc/v8.S: Assemble only if !SPARC64.
	* src/sparc/v9.S: Remove obsolete comment.
	* src/sparc/ffitarget.h (enum ffi_abi): Add FFI_COMPAT_V9.
	(V8_ABI_P): New macro.
	(V9_ABI_P): Likewise.
	(FFI_EXTRA_CIF_FIELDS): Define only if SPARC64.
	* src/sparc/ffi.c (ffi_prep_args_v8): Compile only if !SPARC64.
	(ffi_prep_args_v9): Compile only if SPARC64.
	(ffi_prep_cif_machdep_core): Use V9_ABI_P predicate.
	(ffi_prep_cif_machdep): Guard access to nfixedargs field.
	(ffi_prep_cif_machdep_var): Likewise.
	(ffi_v9_layout_struct): Compile only if SPARC64.
	(ffi_call): Deal with FFI_V8PLUS and FFI_COMPAT_V9 and fix warnings.
	(ffi_prep_closure_loc): Use V9_ABI_P and V8_ABI_P predicates.
	(ffi_closure_sparc_inner_v8): Compile only if !SPARC64.
	(ffi_closure_sparc_inner_v9): Compile only if SPARC64.  Guard access
	to nfixedargs field.

From-SVN: r207822