dm: pci: Save devfn without bus number in pci_uclass_child_post_bind()

In pci_uclass_child_post_bind(), bdf is extracted from fdt_pci_addr.
Mask bus number before save it to pplat->devfn.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c
index c90e7ac..2d12344 100644
--- a/drivers/pci/pci-uclass.c
+++ b/drivers/pci/pci-uclass.c
@@ -794,8 +794,8 @@
 		if (ret != -ENOENT)
 			return -EINVAL;
 	} else {
-		/* extract the bdf from fdt_pci_addr */
-		pplat->devfn = addr.phys_hi & 0xffff00;
+		/* extract the devfn from fdt_pci_addr */
+		pplat->devfn = addr.phys_hi & 0xff00;
 	}
 
 	return 0;