eth: intel: use vmalloc_array() to simplify code

Remove array_size() calls and replace vmalloc() with vmalloc_array() to
simplify the code and maintain consistency with existing kmalloc_array()
usage.

vmalloc_array() is also optimized better, resulting in less instructions
being used.

Signed-off-by: Qianfeng Rong <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c

···
 
 	/* allocate temporary buffer to store rings in */
 	i = max_t(int, interface->num_tx_queues, interface->num_rx_queues);
-	temp_ring = vmalloc(array_size(i, sizeof(struct fm10k_ring)));
+	temp_ring = vmalloc_array(i, sizeof(struct fm10k_ring));
 
 	if (!temp_ring) {
 		err = -ENOMEM;

drivers/net/ethernet/intel/igb/igb_ethtool.c

···
 	}
 
 	if (adapter->num_tx_queues > adapter->num_rx_queues)
-		temp_ring = vmalloc(array_size(sizeof(struct igb_ring),
-					       adapter->num_tx_queues));
+		temp_ring = vmalloc_array(adapter->num_tx_queues,
+					  sizeof(struct igb_ring));
 	else
-		temp_ring = vmalloc(array_size(sizeof(struct igb_ring),
-					       adapter->num_rx_queues));
+		temp_ring = vmalloc_array(adapter->num_rx_queues,
+					  sizeof(struct igb_ring));
 
 	if (!temp_ring) {
 		err = -ENOMEM;

drivers/net/ethernet/intel/igc/igc_ethtool.c

···
 	}
 
 	if (adapter->num_tx_queues > adapter->num_rx_queues)
-		temp_ring = vmalloc(array_size(sizeof(struct igc_ring),
-					       adapter->num_tx_queues));
+		temp_ring = vmalloc_array(adapter->num_tx_queues,
+					  sizeof(struct igc_ring));
 	else
-		temp_ring = vmalloc(array_size(sizeof(struct igc_ring),
-					       adapter->num_rx_queues));
+		temp_ring = vmalloc_array(adapter->num_rx_queues,
+					  sizeof(struct igc_ring));
 
 	if (!temp_ring) {
 		err = -ENOMEM;

drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c

···
 	/* allocate temporary buffer to store rings in */
 	i = max_t(int, adapter->num_tx_queues + adapter->num_xdp_queues,
 		  adapter->num_rx_queues);
-	temp_ring = vmalloc(array_size(i, sizeof(struct ixgbe_ring)));
+	temp_ring = vmalloc_array(i, sizeof(struct ixgbe_ring));
 
 	if (!temp_ring) {
 		err = -ENOMEM;

drivers/net/ethernet/intel/ixgbevf/ethtool.c

···
 	}
 
 	if (new_tx_count != adapter->tx_ring_count) {
-		tx_ring = vmalloc(array_size(sizeof(*tx_ring),
-					     adapter->num_tx_queues +
-						adapter->num_xdp_queues));
+		tx_ring = vmalloc_array(adapter->num_tx_queues +
+					adapter->num_xdp_queues,
+					sizeof(*tx_ring));
 		if (!tx_ring) {
 			err = -ENOMEM;
 			goto clear_reset;