ipv6: get rid of __inet6_hash()

We can now use inet_hash() and __inet_hash() instead of private
functions.

Change-Id: I2e6847b8cbf05cbffe5d24a4d1346aa671df6816
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Git-commit: 77a6a471bc18763cb2e80a8cc92f4c04eae37d32
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Matt Wagantall <mattw@codeaurora.org>