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

[Tobias Burnus]

  Andrew Pinski wrote:
>>> Breaking targets without TFmode, like cris-elf
> Here is a very untested patch which should improve the issue.  I say
> untested because I was writing this for Tobias just for sample code.

The following patch seems to work. However, it is only lightly tested 
(compiled on x86-64-linux and few test cases, neither bootstrapped nor 
regtested).

Tobias
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