mei: use pr_err instead of printk(KERN_ERR

pr_ format is more compact and enable utilizing of pr_fmt macro

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 20f80df..ef5e3ec 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -1201,7 +1201,7 @@
 	/* init pci module */
 	ret = pci_register_driver(&mei_driver);
 	if (ret < 0)
-		printk(KERN_ERR "mei: Error registering driver.\n");
+		pr_err("error registering driver.\n");
 
 	return ret;
 }