Generate regformats/rs6000/powerpc-32.dat

Generate regformats/rs6000/powerpc-32.dat

I will need this description for the ppc-lynxos debugger where, AFAICT,
we only have access to the core GP and FP registers.  So this adds
powerpc-32 to the list of targets for which a .dat file needs  to be
generated.

2010-04-30  Joel Brobecker  <brobecker@adacore.com>

        * features/Makefile (WHICH): Add rs6000/powerpc-32.
        (powerpc-32.o, powerpc-32.c): New rules.
        (clean): Also remove powerpc-32.c.
        * regformats/rs6000/powerpc-32.dat: Generate.