soft-fp: fix _FP_DIV_MEAT_* returning results with wrong exponent (bug 16032)

[David Miller]

From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Wed, 9 Oct 2013 19:18:21 +0000

> David, SPARC testing would be useful as well (especially sparc32 to
> confirm the absence of regressions from the change to
> _FP_DIV_MEAT_4_udiv).

No regressions on 32-bit sparc and 64-bit sparc.