igc: Remove obsolete circuit breaker registers

Part of circuit breaker registers is obsolete
and not applicable for i225 device.
This patch comes to clean up these registers.
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

@@ -307,12 +307,8 @@ void igc_clear_hw_cntrs_base(struct igc_hw *hw)
 	rd32(IGC_ICTXQMTC);
 	rd32(IGC_ICRXDMTC);
 
-	rd32(IGC_CBTMPC);
-	rd32(IGC_HTDPMC);
-	rd32(IGC_CBRMPC);
 	rd32(IGC_RPTHC);
 	rd32(IGC_HGPTC);
-	rd32(IGC_HTCBDPC);
 	rd32(IGC_HGORCL);
 	rd32(IGC_HGORCH);
 	rd32(IGC_HGOTCL);

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

@@ -68,13 +68,6 @@
 #define IGC_ICRXDMTC		0x04120  /* Rx Descriptor Min Threshold Count */
 #define IGC_ICRXOC		0x04124  /* Receiver Overrun Count */
 
-#define IGC_CBTMPC		0x0402C  /* Circuit Breaker TX Packet Count */
-#define IGC_HTDPMC		0x0403C  /* Host Transmit Discarded Packets */
-#define IGC_CBRMPC		0x040FC  /* Circuit Breaker RX Packet Count */
-#define IGC_RPTHC		0x04104  /* Rx Packets To Host */
-#define IGC_HGPTC		0x04118  /* Host Good Packets TX Count */
-#define IGC_HTCBDPC		0x04124  /* Host TX Circ.Breaker Drop Count */
-
 /* MSI-X Table Register Descriptions */
 #define IGC_PBACL		0x05B68  /* MSIx PBA Clear - R/W 1 to clear */