mei: nfc: fix style warning

fix style warning:
void function return statements are not generally useful
Signed-off-by: NTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/mei/nfc.c

@@ -472,7 +472,6 @@ static void mei_nfc_init(struct work_struct *work)
 	mei_nfc_free(ndev);
 	mutex_unlock(&dev->device_lock);
 
-	return;
 }