net: tulip: de4x5: make PCI_signature() return void

This function always return 0 now, we can make it return void to
simplify the code. This fixes the following coccicheck warning:

drivers/net/ethernet/dec/tulip/de4x5.c:3908:11-17: Unneeded variable:
"status". Return "0" on line 3912
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/dec/tulip/de4x5.c

@@ -951,7 +951,7 @@ static void    reset_init_sia(struct net_device *dev, s32 sicr, s32 strr, s32 si
 static int     test_ans(struct net_device *dev, s32 irqs, s32 irq_mask, s32 msec);
 static int     test_tp(struct net_device *dev, s32 msec);
 static int     EISA_signature(char *name, struct device *device);
-static int     PCI_signature(char *name, struct de4x5_private *lp);
+static void    PCI_signature(char *name, struct de4x5_private *lp);
 static void    DevicePresent(struct net_device *dev, u_long iobase);
 static void    enet_addr_rst(u_long aprom_addr);
 static int     de4x5_bad_srom(struct de4x5_private *lp);
@@ -3902,14 +3902,14 @@ EISA_signature(char *name, struct device *device)
 /*
 ** Look for a particular board name in the PCI configuration space
 */
-static int
+static void
 PCI_signature(char *name, struct de4x5_private *lp)
 {
-    int i, status = 0, siglen = ARRAY_SIZE(de4x5_signatures);
+    int i, siglen = ARRAY_SIZE(de4x5_signatures);
 
     if (lp->chipset == DC21040) {
 	strcpy(name, "DE434/5");
-	return status;
+	return;
     } else {                           /* Search for a DEC name in the SROM */
 	int tmp = *((char *)&lp->srom + 19) * 3;
 	strncpy(name, (char *)&lp->srom + 26 + tmp, 8);
@@ -3935,8 +3935,6 @@ PCI_signature(char *name, struct de4x5_private *lp)
     } else if ((lp->chipset & ~0x00ff) == DC2114x) {
 	lp->useSROM = true;
     }
-
-    return status;
 }
 
 /*