[tg3] Add support for BCM57766

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/drivers/net/tg3/tg3.c

 	PCI_ROM(0x14e4, 0x16b6, "14e4-16b6", "14e4-16b6", 0),
 	PCI_ROM(0x14e4, 0x1657, "14e4-1657", "14e4-1657", 0),
 	PCI_ROM(0x14e4, 0x165f, "14e4-165f", "14e4-165f", 0),
+	PCI_ROM(0x14e4, 0x1686, "14e4-1686", "14e4-1686", 0),
 	PCI_ROM(0x1148, 0x4400, "1148-4400", "1148-4400", 0),
 	PCI_ROM(0x1148, 0x4500, "1148-4500", "1148-4500", 0),
 	PCI_ROM(0x173b, 0x03e8, "173b-03e8", "173b-03e8", 0),

src/drivers/net/tg3/tg3.h

 #define  TG3PCI_DEVICE_TIGON3_57761	 0x16b0
 #define  TG3PCI_DEVICE_TIGON3_57762	 0x1682
 #define  TG3PCI_DEVICE_TIGON3_57765	 0x16b4
+#define  TG3PCI_DEVICE_TIGON3_57766	 0x1686
 #define  TG3PCI_DEVICE_TIGON3_57791	 0x16b2
 #define  TG3PCI_DEVICE_TIGON3_57795	 0x16b6
 #define  TG3PCI_DEVICE_TIGON3_5719	 0x1657

src/drivers/net/tg3/tg3_hw.c

 			 tp->pdev->device == TG3PCI_DEVICE_TIGON3_57761 ||
 			 tp->pdev->device == TG3PCI_DEVICE_TIGON3_57762 ||
 			 tp->pdev->device == TG3PCI_DEVICE_TIGON3_57765 ||
+			 tp->pdev->device == TG3PCI_DEVICE_TIGON3_57766 ||
 			 tp->pdev->device == TG3PCI_DEVICE_TIGON3_57791 ||
 			 tp->pdev->device == TG3PCI_DEVICE_TIGON3_57795)
 			pci_read_config_dword(tp->pdev,