drivers: base: Convert to printk alias functions

The file mixes printk calls together with calls to pr_*().
Covert to printk alias functions to unify the code.
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Link: https://lore.kernel.org/r/20200608095217.21162-2-matthias.bgg@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/driver.c

@@ -158,12 +158,12 @@ int driver_register(struct device_driver *drv)
 	if ((drv->bus->probe && drv->probe) ||
 	    (drv->bus->remove && drv->remove) ||
 	    (drv->bus->shutdown && drv->shutdown))
-		printk(KERN_WARNING "Driver '%s' needs updating - please use "
+		pr_warn("Driver '%s' needs updating - please use "
 			"bus_type methods\n", drv->name);
 
 	other = driver_find(drv->name, drv->bus);
 	if (other) {
-		printk(KERN_ERR "Error: Driver '%s' is already registered, "
+		pr_err("Error: Driver '%s' is already registered, "
 			"aborting...\n", drv->name);
 		return -EBUSY;
 	}