Merge branch 'atl_stats'

Sabrina Dubroca says:

====================
atheros: modify statistics code

Following Ben Hutchings's advice on how to fill net_stats in alx [1],
this patch modifies the other atheros ethernet drivers
similarly. Minor whitespace/empty line changes in atl1c and atl1e to
make the code completely consistent between atl1c, atl1e, and alx.

I don't have this hardware, so these patches have only been
compile-tested.

v2 (changes only in atl1):
 - don't set soft_stats.rx_missed_errors (Ben)
 - add errors to soft_stats.{rx,tx}_packets (Ben)
 - add soft_stats.rx_dropped field and update soft_stats.rx_dropped
   instead of netdev->stats (overwritten) outside of the stats
   update function

Detail of the changes (v1):
* atl1/atl1c/atl1e
  - fix collisions computation
  - rx_dropped = rx_rrd_ov
  - rx_over_errors = 0
  - rx_missed_errors = 0
  - X_packets = X_ok + X_errors

* only atl1c/atl1e
  - add rx_rxf_ov to rx_errors

[1] http://www.spinics.net/lists/netdev/msg264930.html
====================

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