powerpc: Remove PPC32 code from pseries specific find_and_init_phbs()

In bdc728a8 ("powerpc: move find_and_init_phbs() to pSeries
specific code"), find_and_init_phbs() was moved into a pseries
specific file, but PPC32 code wasn't removed. Remove it.

See https://lkml.kernel.org/r/552C0AA6.4010403@fau.de



Reported-by: Andreas Ruprecht <andreas.ruprecht@fau.de>
Fixes: bdc728a8
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>