Non-TFmode targets broken with "[fortran,patch] Complete front-end support for __float128"

[FX]

> Hmm, see __int128 implementation. Use the target hook to check if type
> is present for it (scalar_mode_supported_p).

We already call scalar_mode_supported_p, but we can't say "scalar_mode_supported_p (TFmode)" if TFmode is not defined.

For int128, the way I see it is that you use it (TImode) unconditionaly in gcc/tree.c

FX