e1000e: Expand workaround for 10Mb HD throughput bug

In commit 772d05c51c4f4896c120ad418b1e91144a2ac813 "e1000e: slow performance
between two 82579 connected via 10Mbit hub", a workaround was put into place
to address the overaggressive transmit behavior of 82579 parts when connecting
at 10Mbs half-duplex.

This same behavior is seen on i217 and i218 parts as well.  This patch expands
the original workaround to encompass these parts.

Signed-off-by: Dave Ertman <davidx.m.ertman@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/e1000e/ich8lan.h b/drivers/net/ethernet/intel/e1000e/ich8lan.h
index bead50f..8fc6c15 100644
--- a/drivers/net/ethernet/intel/e1000e/ich8lan.h
+++ b/drivers/net/ethernet/intel/e1000e/ich8lan.h
@@ -242,6 +242,7 @@
 #define I217_EEE_CAPABILITY	0x8000	/* IEEE MMD Register 3.20 */
 #define I217_EEE_ADVERTISEMENT	0x8001	/* IEEE MMD Register 7.60 */
 #define I217_EEE_LP_ABILITY	0x8002	/* IEEE MMD Register 7.61 */
+#define I217_RX_CONFIG		0xB20C	/* Receive configuration */
 
 #define E1000_EEE_RX_LPI_RCVD	0x0400	/* Tx LP idle received */
 #define E1000_EEE_TX_LPI_RCVD	0x0800	/* Rx LP idle received */