IB/mlx4: Use IS_ENABLED(CONFIG_IPV6)

...instead of testing defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)

Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Roland Dreier 2014-01-19 15:18:49 -08:00
commit 27cdef637c