ssb: Use dev_driver_string() instead of pci_dev->driver->name

All drivers that use ssb_pcihost_probe(), i.e., b43_pci_bridge_driver and
b44_pci_driver, set the pci_driver.name, and __pci_register_driver() sets
the struct driver.name member to the same value.

Replace dev->driver_name() by dev_driver_string() for the corresponding
struct device. This is a step toward removing pci_dev->driver.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Bjorn Helgaas <[e-mail]>
Acked-by: Michael Büsch <[e-mail]>

drivers/ssb/pcihost_wrapper.c

···
 {
 	struct ssb_bus *ssb;
 	int err = -ENOMEM;
-	const char *name;
 	u32 val;
 
 	ssb = kzalloc(sizeof(*ssb), GFP_KERNEL);
···
 	err = pci_enable_device(dev);
 	if (err)
 		goto err_kfree_ssb;
-	name = dev_name(&dev->dev);
-	if (dev->driver && dev->driver->name)
-		name = dev->driver->name;
-	err = pci_request_regions(dev, name);
+	err = pci_request_regions(dev, dev_driver_string(&dev->dev));
 	if (err)
 		goto err_pci_disable;
 	pci_set_master(dev);