drivers: usb: atm: use pr_err() and pr_warn() instead of raw printk()

Since we have the nice helpers pr_err() and pr_warn(), use them instead
of raw printk().
Acked-by: Duncan Sands <duncan.sands@free.fr>
Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Link: https://lore.kernel.org/r/20201208093206.24780-3-info@metux.netSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/atm/usbatm.c

@@ -1278,7 +1278,7 @@ EXPORT_SYMBOL_GPL(usbatm_usb_disconnect);
 static int __init usbatm_usb_init(void)
 {
 	if (sizeof(struct usbatm_control) > sizeof_field(struct sk_buff, cb)) {
-		printk(KERN_ERR "%s unusable with this kernel!\n", usbatm_driver_name);
+		pr_err("%s unusable with this kernel!\n", usbatm_driver_name);
 		return -EIO;
 	}
 

drivers/usb/atm/xusbatm.c

@@ -179,7 +179,7 @@ static int __init xusbatm_init(void)
 	    num_vendor != num_product ||
 	    num_vendor != num_rx_endpoint ||
 	    num_vendor != num_tx_endpoint) {
-		printk(KERN_WARNING "xusbatm: malformed module parameters\n");
+		pr_warn("xusbatm: malformed module parameters\n");
 		return -EINVAL;
 	}