e1000: Add PCI ID 0x10a4 for our new 4-port PCI-Express device

Device 0x10a4 is a double 82571 on a single PCI-Express card and
has 4 gigabit capable ports.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
diff --git a/drivers/net/e1000/e1000_hw.c b/drivers/net/e1000/e1000_hw.c
index f56d4cd..4b54c48 100644
--- a/drivers/net/e1000/e1000_hw.c
+++ b/drivers/net/e1000/e1000_hw.c
@@ -389,6 +389,7 @@
     case E1000_DEV_ID_82571EB_COPPER:
     case E1000_DEV_ID_82571EB_FIBER:
     case E1000_DEV_ID_82571EB_SERDES:
+    case E1000_DEV_ID_82571EB_QUAD_COPPER:
             hw->mac_type = e1000_82571;
         break;
     case E1000_DEV_ID_82572EI_COPPER: