[v2] powerpc/64: Fix build failure with GCC 8.1

[Michael Ellerman]

On Tue, 2018-05-29 at 06:03:53 UTC, Christophe Leroy wrote:
> CC      arch/powerpc/kernel/nvram_64.o
> arch/powerpc/kernel/nvram_64.c: In function 'nvram_create_partition':
> arch/powerpc/kernel/nvram_64.c:1042:2: error: 'strncpy' specified bound 12 equals destination size [-Werror=stringop-truncation]
>   strncpy(new_part->header.name, name, 12);
>   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
>   CC      arch/powerpc/kernel/trace/ftrace.o
> In function 'make_field',
>     inlined from 'ps3_repository_read_boot_dat_address' at arch/powerpc/platforms/ps3/repository.c:900:9:
> arch/powerpc/platforms/ps3/repository.c:106:2: error: 'strncpy' output truncated before terminating nul copying 8 bytes from a string of the same length [-Werror=stringop-truncation]
>   strncpy((char *)&n, text, 8);
>   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/c95998811807d897ca112ea62d6671

cheers