ipv6: add NUMA awareness to seg6_hmac_init_algo()

Since we allocate per cpu storage, let's also use NUMA hints.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: David Lebrun <david.lebrun@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>