sb/i82801ix: Use macros instead of hard-coded IDs

This patch replaces hard-coded PCI IDs with macros
from pci_ids.h and cleans up some code.

Change-Id: Ie6ea72ac49eb015ef5cbaa98ed2b3400072000b5
Signed-off-by: Felix Singer <felix.singer@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36705
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/southbridge/intel/i82801ix/thermal.c b/src/southbridge/intel/i82801ix/thermal.c
index 2deb84d..8946b02 100644
--- a/src/southbridge/intel/i82801ix/thermal.c
+++ b/src/southbridge/intel/i82801ix/thermal.c
@@ -67,5 +67,5 @@
 static const struct pci_driver ich9_thermal __pci_driver = {
 	.ops	= &device_ops,
 	.vendor	= PCI_VENDOR_ID_INTEL,
-	.device	= 0x2932,
+	.device	= PCI_DEVICE_ID_INTEL_82801IB_THERMAL,
 };