iommu/vt-d: Eliminate pci_physfn() in dmar_find_matched_satc_unit()

The function dmar_find_matched_satc_unit() contains a duplicate call to
pci_physfn(). This call is unnecessary as pci_physfn() has already been
invoked by the caller. Removing the redundant call simplifies the code
and improves efficiency a bit.

Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Link: https://lore.kernel.org/r/20250509140021.4029303-2-wei.w.wang@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: wei-w-wang

drivers/iommu/intel/iommu.c

@@ -2686,7 +2686,6 @@ static struct dmar_satc_unit *dmar_find_matched_satc_unit(struct pci_dev *dev)
 	struct device *tmp;
 	int i;
 
-	dev = pci_physfn(dev);
 	rcu_read_lock();
 
 	list_for_each_entry_rcu(satcu, &dmar_satc_units, list) {