iproute2: Fix build failure on ppc64

iproute2: Fix build failure on ppc64

Backport three patches from upstream for ppc64:

http://git.kernel.org/cgit/linux/kernel/git/shemminger/iproute2.git
ae70d96 ipntable: more fixes for ppc64
a55a8fd fix dependency on sizeof(__u64) == sizeof(unsigned long long)
a7c2882 ip: fix ipv6 ntable on ppc64

(From OE-Core rev: 041f784c06403e1d418be677fd15ea159c3bf90d)

Signed-off-by: Ting Liu <b28495@freescale.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>