PCI: Drop warning about drivers that don't use pci_set_master()

f41f064cf4 ("PCI: Workaround missing pci_set_master in pci drivers") made
pci_enable_bridge() turn on bus mastering if the driver hadn't done so
already.  It also added a warning in this case.  But there's no reason to
warn about it unless it's actually a problem to enable bus mastering here.

This patch drops the warning because I'm not aware of any such problem.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Paul Bolle <pebolle@tiscali.nl>

drivers/pci/pci.c

@@ -1156,10 +1156,8 @@ static void pci_enable_bridge(struct pci_dev *dev)
 	pci_enable_bridge(dev->bus->self);
 
 	if (pci_is_enabled(dev)) {
-		if (!dev->is_busmaster) {
+		if (!dev->is_busmaster)
-			dev_warn(&dev->dev, "driver skip pci_set_master, fix it!\n");
 			pci_set_master(dev);
-		}
 		return;
 	}