{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/sandybridge/gma.c b/src/northbridge/intel/sandybridge/gma.c
index 7f7ea0c..0d28d67 100644
--- a/src/northbridge/intel/sandybridge/gma.c
+++ b/src/northbridge/intel/sandybridge/gma.c
@@ -653,18 +653,6 @@
 	intel_gma_restore_opregion();
 }
 
-static void gma_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 & 0xffff) << 16) | (vendor & 0xffff));
-	}
-}
-
 const struct i915_gpu_controller_info *
 intel_gma_get_controller_info(void)
 {
@@ -731,7 +719,7 @@
 }
 
 static struct pci_operations gma_pci_ops = {
-	.set_subsystem    = gma_set_subsystem,
+	.set_subsystem    = pci_dev_set_subsystem,
 };
 
 static struct device_operations gma_func0_ops = {