{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>

src/soc/intel/broadwell/chip.c

@@ -64,17 +64,6 @@ struct chip_operations soc_intel_broadwell_ops = {
 	.init       = &broadwell_init_pre_device,
 };
 
-static void pci_set_subsystem(struct device *dev, unsigned int vendor,
-	unsigned int 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 << 16) | vendor);
-}
-
 struct pci_operations broadwell_pci_ops = {
-	.set_subsystem = &pci_set_subsystem
+	.set_subsystem = &pci_dev_set_subsystem
 };