igc: Remove header redirection register

Header redirection missed packet counter not applicable for i225 device.
This patch comes to clean up this register.
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_regs.h

@@ -199,7 +199,6 @@
 #define IGC_HGOTCL	0x04130  /* Host Good Octets Transmit Count Low */
 #define IGC_HGOTCH	0x04134  /* Host Good Octets Transmit Count High */
 #define IGC_LENERRS	0x04138  /* Length Errors Count */
-#define IGC_HRMPC	0x0A018  /* Header Redirection Missed Packet Count */
 
 /* Time sync registers */
 #define IGC_TSICR	0x0B66C  /* Time Sync Interrupt Cause */