net: tulip: remove redundant assignment to variable new_csr6

Variable new_csr6 is being initialized with a value that is never
read, it is being re-assigned later on. The assignment is redundant
and can be removed.
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220123183440.112495-1-colin.i.king@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/dec/tulip/pnic.c

@@ -21,7 +21,7 @@ void pnic_do_nway(struct net_device *dev)
 	struct tulip_private *tp = netdev_priv(dev);
 	void __iomem *ioaddr = tp->base_addr;
 	u32 phy_reg = ioread32(ioaddr + 0xB8);
-	u32 new_csr6 = tp->csr6 & ~0x40C40200;
+	u32 new_csr6;
 
 	if (phy_reg & 0x78000000) { /* Ignore baseT4 */
 		if (phy_reg & 0x20000000)		dev->if_port = 5;