pcnet32: fix warning

pci_name() will be changed to return `const char *':

drivers/net/pcnet32.c: In function 'pcnet32_probe1':
drivers/net/pcnet32.c:1884: warning: passing argument 2 of 'pcnet32_alloc_ring' discards qualifiers from pointer target type

Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

drivers/net/pcnet32.c

@@ -325,7 +325,7 @@ static int pcnet32_get_regs_len(struct net_device *dev);
 static void pcnet32_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 			     void *ptr);
 static void pcnet32_purge_tx_ring(struct net_device *dev);
-static int pcnet32_alloc_ring(struct net_device *dev, char *name);
+static int pcnet32_alloc_ring(struct net_device *dev, const char *name);
 static void pcnet32_free_ring(struct net_device *dev);
 static void pcnet32_check_media(struct net_device *dev, int verbose);
 
@@ -1983,7 +1983,7 @@ pcnet32_probe1(unsigned long ioaddr, int shared, struct pci_dev *pdev)
 }
 
 /* if any allocation fails, caller must also call pcnet32_free_ring */
-static int pcnet32_alloc_ring(struct net_device *dev, char *name)
+static int pcnet32_alloc_ring(struct net_device *dev, const char *name)
 {
 	struct pcnet32_private *lp = netdev_priv(dev);