caif_usb: use target structure member in memset

parent cfusbl was used instead of first structure member 'layer'

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/caif/caif_usb.c

@@ -92,7 +92,7 @@ static struct cflayer *cfusbl_create(int phyid, u8 ethaddr[ETH_ALEN],
 
 	caif_assert(offsetof(struct cfusbl, layer) == 0);
 
-	memset(this, 0, sizeof(struct cflayer));
+	memset(&this->layer, 0, sizeof(this->layer));
 	this->layer.receive = cfusbl_receive;
 	this->layer.transmit = cfusbl_transmit;
 	this->layer.ctrlcmd = cfusbl_ctrlcmd;