[Bug web/62211] ./configure --with-float= and ARM

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62211

--- Comment #1 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
-m{soft,hard}-float for arm should be considered deprecated (we try to support
them by mapping them onto the -mfloat-abi option), and deliberately no-longer
document them.  

Rather than clarifying what they do, the references elsewhere should be cleaned
up to use -mfloat-abi.  Specifically, in this case, the reference to
-msoft-float should be changed to -mfloat-abi=soft.