net/iavf: fix port stats clearing

[ upstream commit 57fc68cf11cf3ec49526d8a8eca98956d5b77989 ]

After VF reset, kernel driver may reuse the original VSI without reset its
stats. Call 'iavf_dev_stats_reset' during the initialization of the VF in
order to clear any statistics that may exist from the last use of the VF
and to avoid statistics errors.

Fixes: 22b123a ("net/avf: initialize PMD")

Signed-off-by: Kuan Xu <kuanx.xu@intel.com>
Signed-off-by: Yiding Zhou <yidingx.zhou@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>

drivers/net/iavf/iavf_ethdev.c

@@ -2076,6 +2076,8 @@ iavf_dev_init(struct rte_eth_dev *eth_dev)
 		return ret;
 	}
 
+	iavf_dev_stats_reset(eth_dev);
+
 	return 0;
 }