powerpc: Replace cpumask_weight(cpu_possible_mask) with num_possible_cpus()

num_possible_cpus() is just a shorthand for it.

Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --cc arch/powerpc/platforms/cell/smp.c
Simple merge

diff --cc arch/powerpc/platforms/pseries/hotplug-cpu.c
Simple merge

diff --cc arch/powerpc/sysdev/mpic.c
Simple merge

diff --cc arch/powerpc/sysdev/xics/xics-common.c
Simple merge