net/mlx4_en: Use ethtool_puts to fill priv flags strings

Use the ethtool_puts helper to print the priv flags strings into the
ethtool strings interface.
Signed-off-by: Kamal Heib <kheib@redhat.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240617172329.239819-2-kheib@redhat.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mellanox/mlx4/en_ethtool.c

@@ -536,8 +536,7 @@ static void mlx4_en_get_strings(struct net_device *dev,
 		break;
 	case ETH_SS_PRIV_FLAGS:
 		for (i = 0; i < ARRAY_SIZE(mlx4_en_priv_flags); i++)
-			strcpy(data + i * ETH_GSTRING_LEN,
-			       mlx4_en_priv_flags[i]);
+			ethtool_puts(&data, mlx4_en_priv_flags[i]);
 		break;
 
 	}