Merge branch 'selftests-forwarding-GRE-multipath-fixes'

Ido Schimmel says:

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selftests: forwarding: GRE multipath fixes

Patch #1 ensures IPv4 forwarding is enabled during the test.

Patch #2 fixes the flower filters used to measure the distribution of
the traffic between the two nexthops, so that the test will pass
regardless if traffic is offloaded or not.
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Signed-off-by: David S. Miller <davem@davemloft.net>