{northbridge, soc, southbridge}/intel: Make use of pci_dev_set_subsystem()

This patch removes local definitions of sub_system function and make use
of common function pci_dev_set_subsystem().

Change-Id: I91982597fdf586ab514bec3d8e4d09f2565fe56d
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31982
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: David Guckian
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/soc/intel/denverton_ns/chip.c b/src/soc/intel/denverton_ns/chip.c
index 68bd60c..b72bf28 100644
--- a/src/soc/intel/denverton_ns/chip.c
+++ b/src/soc/intel/denverton_ns/chip.c
@@ -129,21 +129,8 @@
 	.final = soc_final
 };
 
-static void soc_set_subsystem(struct device *dev, uint32_t vendor,
-			      uint32_t device)
-{
-	if (!vendor || !device) {
-		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
-				   pci_read_config32(dev, PCI_VENDOR_ID));
-	} else {
-		pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
-				   ((device & 0xffff) << 16) |
-					   (vendor & 0xffff));
-	}
-}
-
 struct pci_operations soc_pci_ops = {
-	.set_subsystem = soc_set_subsystem,
+	.set_subsystem = pci_dev_set_subsystem,
 };
 
 /*