PCI: improve discovery/configuration messages

This makes PCI resource management messages more consistent and adds a few
new messages to aid debugging.

Whenever we assign resources to a device, update a BAR, or change a
bridge aperture, it's worth noting it.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 930eadf..f88de09 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2575,7 +2575,7 @@
 			return reg;
 	}
 
-	dev_err(&dev->dev, "BAR: invalid resource #%d\n", resno);
+	dev_err(&dev->dev, "BAR %d: invalid resource\n", resno);
 	return 0;
 }