net: dns: Do not resolve IPv6 address if IPv6 is disabled

If IPv6 is disabled, then it is useless to try to resolve
IPv6 address because "struct sockaddr" does not have enough
space to store IPv6 address.

Fixes #1487

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
4 files changed