dm: pci: Add a dm_ prefix to pci_get_bdf()

Most driver model PCI functions have a dm_ prefix. At some point, when the
old code is converted to driver model and the old functions are removed, we
will drop that prefix.

For consistency, we should use the dm_ prefix for all driver model
functions. Update pci_get_bdf() accordingly.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/net/pch_gbe.c b/drivers/net/pch_gbe.c
index dfc0100..1b4dd56 100644
--- a/drivers/net/pch_gbe.c
+++ b/drivers/net/pch_gbe.c
@@ -424,7 +424,7 @@
 	pci_dev_t devno;
 	u32 iobase;
 
-	devno = pci_get_bdf(dev);
+	devno = dm_pci_get_bdf(dev);
 
 	/*
 	 * The priv structure contains the descriptors and frame buffers which