[IPV6]: Decentralize EXPORT_SYMBOLs.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

diff --cc net/ipv6/Makefile
Simple merge

diff --cc net/ipv6/addrconf.c
Simple merge

diff --cc net/ipv6/af_inet6.c
Simple merge

diff --cc net/ipv6/exthdrs.c
Simple merge

diff --cc net/ipv6/icmp.c
Simple merge

diff --cc net/ipv6/ip6_output.c
Simple merge

diff --cc net/ipv6/ipv6_sockglue.c
Simple merge

diff --cc net/ipv6/ipv6_syms.c
Simple merge

diff --cc net/ipv6/ndisc.c
Simple merge

diff --cc net/ipv6/protocol.c
Simple merge

diff --cc net/ipv6/route.c
Simple merge

diff --cc net/ipv6/xfrm6_input.c
Simple merge

diff --cc net/ipv6/xfrm6_output.c
Simple merge