powerpc: powernv: Fix build error on const discarding

[Michael Ellerman]

On Wed, 2017-08-16 at 12:34:44 UTC, Corentin Labbe wrote:
> When building a random powerpc kernel I hit this build error:
>   CC      arch/powerpc/platforms/powernv/opal-imc.o
> arch/powerpc/platforms/powernv/opal-imc.c: In function « disable_nest_pmu_counters »:
> arch/powerpc/platforms/powernv/opal-imc.c:130:13: error : assignment discards « const » qualifier from pointer target type [-Werror=discarded-qualifiers]
>    l_cpumask = cpumask_of_node(nid);
>              ^
> This patch simply add const to l_cpumask to fix this issue.
> 
> Signed-off-by: Corentin Labbe <clabbe.montjoie at gmail.com>
> Reviewed-by: Madhavan Srinivasan <maddy at linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/6538ac30841638b2fd345725a9fd15

cheers