[2/2] powerpc/pseries: Declare optional dummy function for find_and_online_cpu_nid

[Michael Ellerman]

On Mon, 2018-02-12 at 22:34:08 UTC, Guenter Roeck wrote:
> Commit e67e02a544e9 ("powerpc/pseries: Fix cpu hotplug crash with
> memoryless nodes") adds an unconditional call to find_and_online_cpu_nid(),
> which is only declared if CONFIG_PPC_SPLPAR is enabled. This results in
> the following build error if this is not the case.
> 
> arch/powerpc/platforms/pseries/hotplug-cpu.o: In function `dlpar_online_cpu':
> arch/powerpc/platforms/pseries/hotplug-cpu.c:369:
> 			undefined reference to `.find_and_online_cpu_nid'
> 
> Follow the guideline provided by similar functions and provide a dummy
> function if CONFIG_PPC_SPLPAR is not enabled. This also moves the external
> function declaration into an include file where it should be.
> 
> Fixes: e67e02a544e9 ("powerpc/pseries: Fix cpu hotplug crash with ...")
> Cc: Michael Bringmann <mwb at linux.vnet.ibm.com>
> Cc: Michael Ellerman <mpe at ellerman.id.au>
> Cc: Nathan Fontenot <nfont at linux.vnet.ibm.com>
> Signed-off-by: Guenter Roeck <linux at roeck-us.net>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/82343484a2d4c97a03bfd81303b549

cheers