* sh.h (current_function_anonymous_args): Remove.
(SETUP_INCOMING_VARARGS): Don't set it - just check that one
of current_function_varargs and current_function_stdarg is set.
* sh.c (sh_expand_prologue): Check current_function_varargs /
current_function_stdarg / TARGET_SH5 instead of
current_function_anonymous_args.
* sh64.h (TARGET_VERSION): Define.
Fix comments that to refer to SH architecture -
the architecture is no longer exclusive to Hitachi.