net/sunrpc/svcauth_unix.c: GCC 4.9.x warning fix up

Signed-off-by: Paul Reioux <reioux@gmail.com>
include/linux/sunrpc/cache.h: GCC 4.9.x warning fix up

Signed-off-by: Paul Reioux <reioux@gmail.com>
Add -Void-Kernel-LP to defconfig and .config

Signed-off-by: Paul Keith <javelinanddart@gmail.com>