Clean up platform-specific code in gas/write.c

[Geoff Keating]

> From: Alexandre Oliva <aoliva@redhat.com>
> Date: 19 Aug 2000 14:06:50 -0300

> Presumably, PC-relative relocations should not be deferred to the
> linker, since they may be limited in range.

This is target-dependent (the 'may be', the 'since', and the 'should
not', all different on different platforms).

-- 
- Geoffrey Keating <geoffk@cygnus.com>