Merge branch 'hv_netvsc-fix-error-handling-in-netvsc_attach-set_features'

Haiyang Zhang says:

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hv_netvsc: fix error handling in netvsc_attach/set_features

The error handling code path in these functions are not correct.
This patch set fixes them.
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Signed-off-by: David S. Miller <davem@davemloft.net>