can: etas_es58x: add missing a blank line after declaration

Fix below checkpatch warning:

  WARNING: Missing a blank line after declarations
  #2233: FILE: drivers/net/can/usb/etas_es58x/es58x_core.c:2233:
  +		int ret = es58x_init_netdev(es58x_dev, ch_idx);
  +		if (ret) {

Fixes: d8f26fd6 ("can: etas_es58x: remove es58x_get_product_info()")
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20230924110914.183898-3-mailhol.vincent@wanadoo.frSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/usb/etas_es58x/es58x_core.c

@@ -2230,6 +2230,7 @@ static int es58x_probe(struct usb_interface *intf,
 
 	for (ch_idx = 0; ch_idx < es58x_dev->num_can_ch; ch_idx++) {
 		int ret = es58x_init_netdev(es58x_dev, ch_idx);
+
 		if (ret) {
 			es58x_free_netdevs(es58x_dev);
 			return ret;