xen: move from strlcpy with unused retval to strscpy

Follow the advice of the below link and prefer 'strscpy' in this
subsystem. Conversion is 1:1 because the return value is not used.
Generated by a coccinelle script.

Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: NOleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Link: https://lore.kernel.org/r/20220818210122.7613-1-wsa+renesas@sang-engineering.comSigned-off-by: NJuergen Gross <jgross@suse.com>

drivers/xen/xen-scsiback.c

@@ -1121,7 +1121,7 @@ static void scsiback_do_1lun_hotplug(struct vscsibk_info *info, int op,
 				"%s: writing %s", __func__, state);
 		return;
 	}
-	strlcpy(phy, val, VSCSI_NAMELEN);
+	strscpy(phy, val, VSCSI_NAMELEN);
 	kfree(val);
 
 	/* virtual SCSI device */

drivers/xen/xenbus/xenbus_probe_frontend.c

@@ -40,7 +40,7 @@ static int frontend_bus_id(char bus_id[XEN_BUS_ID_SIZE], const char *nodename)
 		return -EINVAL;
 	}
 
-	strlcpy(bus_id, nodename + 1, XEN_BUS_ID_SIZE);
+	strscpy(bus_id, nodename + 1, XEN_BUS_ID_SIZE);
 	if (!strchr(bus_id, '/')) {
 		pr_warn("bus_id %s no slash\n", bus_id);
 		return -EINVAL;