cassini: Removing dead CASSINI_MULTICAST_REG_WRITE

CASSINI_MULTICAST_REG_WRITE doesn't exist in Kconfig, therefore
removing all references for it from the source code.

Signed-off-by: Christoph Egger <siccegge@cs.fau.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/cassini.c

@@ -3063,9 +3063,6 @@ static void cas_init_mac(struct cas *cp)
 {
 	unsigned char *e = &cp->dev->dev_addr[0];
 	int i;
-#ifdef CONFIG_CASSINI_MULTICAST_REG_WRITE
-	u32 rxcfg;
-#endif
 	cas_mac_reset(cp);
 
 	/* setup core arbitration weight register */
@@ -3133,23 +3130,8 @@ static void cas_init_mac(struct cas *cp)
 	writel(0xc200, cp->regs + REG_MAC_ADDRN(43));
 	writel(0x0180, cp->regs + REG_MAC_ADDRN(44));
 
-#ifndef CONFIG_CASSINI_MULTICAST_REG_WRITE
 	cp->mac_rx_cfg = cas_setup_multicast(cp);
-#else
-	/* WTZ: Do what Adrian did in cas_set_multicast. Doing
-	 * a writel does not seem to be necessary because Cassini
-	 * seems to preserve the configuration when we do the reset.
-	 * If the chip is in trouble, though, it is not clear if we
-	 * can really count on this behavior. cas_set_multicast uses
-	 * spin_lock_irqsave, but we are called only in cas_init_hw and
-	 * cas_init_hw is protected by cas_lock_all, which calls
-	 * spin_lock_irq (so it doesn't need to save the flags, and
-	 * we should be OK for the writel, as that is the only
-	 * difference).
-	 */
-	cp->mac_rx_cfg = rxcfg = cas_setup_multicast(cp);
-	writel(rxcfg, cp->regs + REG_MAC_RX_CFG);
-#endif
+
 	spin_lock(&cp->stat_lock[N_TX_RINGS]);
 	cas_clear_mac_err(cp);
 	spin_unlock(&cp->stat_lock[N_TX_RINGS]);