igc: Remove TCP segmentation TX fail counter

TCP segmentation TX context fail counter is not
applicable for i225 devices.
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

@@ -289,7 +289,6 @@ void igc_clear_hw_cntrs_base(struct igc_hw *hw)
 	rd32(IGC_TNCRS);
 	rd32(IGC_HTDPMC);
 	rd32(IGC_TSCTC);
-	rd32(IGC_TSCTFC);
 
 	rd32(IGC_MGTPRC);
 	rd32(IGC_MGTPDC);

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

@@ -3740,7 +3740,6 @@ void igc_update_stats(struct igc_adapter *adapter)
 	adapter->stats.algnerrc += rd32(IGC_ALGNERRC);
 
 	adapter->stats.tsctc += rd32(IGC_TSCTC);
-	adapter->stats.tsctfc += rd32(IGC_TSCTFC);
 
 	adapter->stats.iac += rd32(IGC_IAC);
 	adapter->stats.icrxoc += rd32(IGC_ICRXOC);

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

@@ -181,7 +181,6 @@
 #define IGC_MPTC	0x040F0  /* Multicast Packets Tx Count - R/clr */
 #define IGC_BPTC	0x040F4  /* Broadcast Packets Tx Count - R/clr */
 #define IGC_TSCTC	0x040F8  /* TCP Segmentation Context Tx - R/clr */
-#define IGC_TSCTFC	0x040FC  /* TCP Segmentation Context Tx Fail - R/clr */
 #define IGC_IAC		0x04100  /* Interrupt Assertion Count */
 #define IGC_ICTXPTC	0x0410C  /* Interrupt Cause Tx Pkt Timer Expire Count */
 #define IGC_ICTXATC	0x04110  /* Interrupt Cause Tx Abs Timer Expire Count */