[intel] Add Intel I217 Gigabit Ethernet PCI ID

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

src/drivers/net/intel.c

 	PCI_ROM ( 0x8086, 0x1526, "82576-5", "82576", 0 ),
 	PCI_ROM ( 0x8086, 0x1527, "82580-f2", "82580 Fiber", 0 ),
 	PCI_ROM ( 0x8086, 0x1533, "i210", "I210", 0 ),
+	PCI_ROM ( 0x8086, 0x153b, "i217", "I217", 0 ),
 	PCI_ROM ( 0x8086, 0x294c, "82566dc-2", "82566DC-2", 0 ),
 	PCI_ROM ( 0x8086, 0x2e6e, "cemedia", "CE Media Processor", 0 ),
 };