liquidio: Use zeroing memory allocator than allocator/memset

Use vzalloc for allocating zeroed memory and remove unnecessary
memset function.

Done using Coccinelle.
Generated-by: scripts/coccinelle/api/alloc/kzalloc-simple.cocci
0-day tested with no failures.
Suggested-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/liquidio/octeon_device.c

@@ -702,12 +702,10 @@ static struct octeon_device *octeon_allocate_device_mem(u32 pci_id,
 	size = octdevsize + priv_size + configsize +
 		(sizeof(struct octeon_dispatch) * DISPATCH_LIST_SIZE);
 
-	buf = vmalloc(size);
+	buf = vzalloc(size);
 	if (!buf)
 		return NULL;
 
-	memset(buf, 0, size);
-
 	oct = (struct octeon_device *)buf;
 	oct->priv = (void *)(buf + octdevsize);
 	oct->chip = (void *)(buf + octdevsize + priv_size);
@@ -840,10 +838,9 @@ octeon_allocate_ioq_vector(struct octeon_device  *oct)
 
 	size = sizeof(struct octeon_ioq_vector) * num_ioqs;
 
-	oct->ioq_vector = vmalloc(size);
+	oct->ioq_vector = vzalloc(size);
 	if (!oct->ioq_vector)
 		return 1;
-	memset(oct->ioq_vector, 0, size);
 	for (i = 0; i < num_ioqs; i++) {
 		ioq_vector		= &oct->ioq_vector[i];
 		ioq_vector->oct_dev	= oct;