net: pcnet: Replace memset+malloc with calloc

This combination of functions can be replaced with calloc(),
make it so.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/pcnet.c b/drivers/net/pcnet.c
index 72b9380..b670cff 100644
--- a/drivers/net/pcnet.c
+++ b/drivers/net/pcnet.c
@@ -184,12 +184,11 @@
 		/*
 		 * Allocate and pre-fill the device structure.
 		 */
-		dev = (struct eth_device *)malloc(sizeof(*dev));
+		dev = calloc(1, sizeof(*dev));
 		if (!dev) {
 			printf("pcnet: Can not allocate memory\n");
 			break;
 		}
-		memset(dev, 0, sizeof(*dev));
 		dev->priv = (void *)(unsigned long)devbusfn;
 		sprintf(dev->name, "pcnet#%d", dev_nr);