nb/intel/haswell: Add server processor host bridge device ID

The device ID is documented in "Intel Xeon Processor E3-1200 v3
Product Family Datasheet volume 2" section 2.2.

Tested with ASRock H81M-HDS with Xeon E3-1271 v3. SeaBIOS payload can
find the boot devices, and GRUB payload can boot Debian GNU/Linux on
the SATA disk.

Change-Id: I999391c9bbc6b39526ad7aec8a6d8fe1a9b5f921
Signed-off-by: Iru Cai <mytbk920423@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30266
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/northbridge/intel/haswell/northbridge.c

@@ -480,6 +480,7 @@ static const unsigned short mc_pci_device_ids[] = {
 	0x0c00, /* Desktop */
 	0x0c04, /* Mobile */
 	0x0a04, /* ULT */
+	0x0c08, /* Server */
 	0
 };