igc: Remove Sequence Error Counter

Accordance to the i225 datasheet sequence error counter does not
applicable to the i225 device.
This patch comes to clean up this counter.

Signed-off-by: Sasha Neftin <sasha.neftin@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/igc/igc_mac.c

@@ -243,7 +243,6 @@ void igc_clear_hw_cntrs_base(struct igc_hw *hw)
 	rd32(IGC_COLC);
 	rd32(IGC_RERC);
 	rd32(IGC_DC);
-	rd32(IGC_SEC);
 	rd32(IGC_RLEC);
 	rd32(IGC_XONRXC);
 	rd32(IGC_XONTXC);

drivers/net/ethernet/intel/igc/igc_main.c

@@ -3701,7 +3701,6 @@ void igc_update_stats(struct igc_adapter *adapter)
 	adapter->stats.prc511 += rd32(IGC_PRC511);
 	adapter->stats.prc1023 += rd32(IGC_PRC1023);
 	adapter->stats.prc1522 += rd32(IGC_PRC1522);
-	adapter->stats.sec += rd32(IGC_SEC);
 
 	mpc = rd32(IGC_MPC);
 	adapter->stats.mpc += mpc;

drivers/net/ethernet/intel/igc/igc_regs.h

@@ -137,7 +137,6 @@
 #define IGC_RERC	0x0402C  /* Receive Error Count - R/clr */
 #define IGC_DC		0x04030  /* Defer Count - R/clr */
 #define IGC_TNCRS	0x04034  /* Tx-No CRS - R/clr */
-#define IGC_SEC		0x04038  /* Sequence Error Count - R/clr */
 #define IGC_CEXTERR	0x0403C  /* Carrier Extension Error Count - R/clr */
 #define IGC_RLEC	0x04040  /* Receive Length Error Count - R/clr */
 #define IGC_XONRXC	0x04048  /* XON Rx Count - R/clr */