[PATCH 3/4] NET : makes ipv6 use the {DEFINE|REF}_PROTO_INUSE infrastructure

Trivial patch to make "tcpv6,udpv6,udplitev6,rawv6" protocols uses the 
fast "inuse sockets" infrastructure

Each protocol use then a static percpu var, instead of a dynamic one. 
This saves some ram and some cpu cycles


Signed-off-by: Eric Dumazet <redacted>

 net/ipv6/raw.c      |    3 +++
 net/ipv6/tcp_ipv6.c |    3 +++
 net/ipv6/udp.c      |    3 +++
 net/ipv6/udplite.c  |    3 +++
 4 files changed, 12 insertions(+)