Merge branch 'selftests-fix'

Po-Hsu Lin says:

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selftests: net: fix for arp_ndisc_evict_nocarrier test

This patchset will fix a false-positive issue caused by the command in
cleanup_v6() of the arp_ndisc_evict_nocarrier test.

Also, it will make the test to return a non-zero value for any failure
reported in the test for us to avoid false-negative results.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>