net: ks8851: Replace malloc()+memset() with calloc()

Replace combination of malloc()+memset() with calloc() as the behavior
is exactly the same and the amount of code is reduced. Moreover, remove
printf() in the fail path, as it is useless, and return proper -ENOMEM
return code.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Eugen Hristev <eugen.hristev@microchip.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/ks8851_mll.c b/drivers/net/ks8851_mll.c
index 6643d1e..51113a8 100644
--- a/drivers/net/ks8851_mll.c
+++ b/drivers/net/ks8851_mll.c
@@ -604,12 +604,9 @@
 {
 	struct eth_device *dev;
 
-	dev = malloc(sizeof(*dev));
-	if (!dev) {
-		printf("Error: Failed to allocate memory\n");
-		return -1;
-	}
-	memset(dev, 0, sizeof(*dev));
+	dev = calloc(1, sizeof(*dev));
+	if (!dev)
+		return -ENOMEM;
 
 	dev->iobase = base_addr;