[patch] ixgbe stats cleanup

[Andrew Boyer]

This patch fixes some nits in the ixgbe driver statistics:
 - Only read FCCRC and FCLAST on 82599+
 - Store total_missed_rx in stats.mpctotal, and display it in a sysctl
 - Don't increment if_opackets and if_ipackets every packet; they're overwritten by hw stats collection
 - Increment adapter->dropped_pkts instead of if_ierrors; if_ierrors is overwritten by hw stats collection
 - Include adapter->dropped_pkts in the calculation of if_ierrors
 - Increment rxr->packets so that AIM works

Comments welcome.

-Andrew

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Andrew Boyer	aboyer at averesystems.com