net: broadcom: bcm4908_enet: use kcalloc() instead of kzalloc()

Use 2-factor multiplication argument form kcalloc() instead
of kzalloc().

Link: https://github.com/KSPP/linux/issues/162Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20211006180843.GA913399@embeddedorSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bcm4908_enet.c

@@ -170,7 +170,7 @@ static int bcm4908_dma_alloc_buf_descs(struct bcm4908_enet *enet,
 		goto err_free_buf_descs;
 	}
 
-	ring->slots = kzalloc(ring->length * sizeof(*ring->slots), GFP_KERNEL);
+	ring->slots = kcalloc(ring->length, sizeof(*ring->slots), GFP_KERNEL);
 	if (!ring->slots)
 		goto err_free_buf_descs;