powerpc/85xx: Fix SMP compile error and allow NULL for smp_ops
The following commit introduced a compile error since it removed
the implementation of smp_85xx_basic_setup:
commit
77c0a700c1c292edafa11c1e52821ce4636f81b0
Author: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Fri Aug 28 14:25:04 2009 +1000
powerpc: Properly start decrementer on BookE secondary CPUs
Make it so that smp_ops probe() and setup_cpu() can be set to NULL.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>