Remove an unnecessicary bzero that was zeroing the softc's struct ifnet

pointer.

Submitted by:	brueffer
Reviewed by:	dfr

sys/dev/firewire/if_fwip.c

@@ -175,7 +175,6 @@ fwip_attach(device_t dev)
 	if (ifp == NULL)
 		return (ENOSPC);
 
-	bzero(fwip, sizeof(struct fwip_softc));
 	/* XXX */
 	fwip->dma_ch = -1;