sb/intel/lynxpoint: Add a PCI ID for an SMBus controller

The PCI ID was taken from the output of `lspci` on an ASRock H81M-HDS.

Change-Id: Idc222392a0973f9ea62b943d18dd762b48c76d17
Signed-off-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-on: https://review.coreboot.org/29377
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/southbridge/intel/lynxpoint/smbus.c

@@ -109,7 +109,10 @@ static struct device_operations smbus_ops = {
 	.ops_pci		= &smbus_pci_ops,
 };
 
-static const unsigned short pci_device_ids[] = { 0x1c22, 0x1e22, 0x9c22, 0 };
+static const unsigned short pci_device_ids[] = {
+	0x1c22, 0x1e22, 0x8c22, 0x9c22,
+	0
+};
 
 static const struct pci_driver pch_smbus __pci_driver = {
 	.ops	 = &smbus_ops,