{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/northbridge/intel/e7505/northbridge.c b/src/northbridge/intel/e7505/northbridge.c
index e3d3faf..7cb0b5b 100644
--- a/src/northbridge/intel/e7505/northbridge.c
+++ b/src/northbridge/intel/e7505/northbridge.c
@@ -74,15 +74,8 @@
 	assign_resources(dev->link_list);
 }
 
-static void intel_set_subsystem(struct device *dev, unsigned int vendor,
-				unsigned int device)
-{
-	pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
-		((device & 0xffff) << 16) | (vendor & 0xffff));
-}
-
 static struct pci_operations intel_pci_ops = {
-	.set_subsystem = intel_set_subsystem,
+	.set_subsystem = pci_dev_set_subsystem,
 };
 
 static struct device_operations pci_domain_ops = {