alpha.c (va_list_skip_additions): Only define if TARGET_ABI_OSF.

alpha.c (va_list_skip_additions): Only define if TARGET_ABI_OSF.

        * config/alpha/alpha.c (va_list_skip_additions): Only define if
        TARGET_ABI_OSF.
        (TARGET_STDARG_OPTIMIZE_HOOK): Likewise.
        (alpha_stdarg_optimize_hook): Likewise.  Allow for one more round
        of indirection through ssa names while looking for the gpr counter
        field.
        (alpha_setup_incoming_varargs) <TARGET_ABI_OSF>: Make use of the
        saved va_list_gpr_size and va_list_fpr_size.

From-SVN: r98286