net: e1000: Add support for the Intel 82546GB controller

This chip is equipped for example on the esd PMC-ETH2-GB board. So let's
add it to the list of supported chips to the e1000 driver.

Signed-off-by: Reinhard Arlt <reinhard.arlt@esd.eu>
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/drivers/net/e1000.c b/drivers/net/e1000.c
index 7f9f783..2825342 100644
--- a/drivers/net/e1000.c
+++ b/drivers/net/e1000.c
@@ -79,6 +79,7 @@
 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82546EB_COPPER},
 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82545EM_FIBER},
 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82546EB_FIBER},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82546GB_COPPER},
 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82540EM_LOM},
 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82541ER},
 	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82541GI_LF},