PCI: mvebu: Use devm_kcalloc() to allocate an array

Rather than using devm_kzalloc() and multiplying the element and number,
use the provided devm_kcalloc() helper for this.

Tested-by: Willy Tarreau <[email protected]> (Iomega iConnect Kirkwood, MiraBox Armada 370)
Tested-by: Andrew Lunn <[email protected]> (D-Link DIR664 Kirkwood)
Tested-by: Thomas Petazzoni <[email protected]> (Armada XP GP)
Signed-off-by: Russell King <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Thomas Petazzoni <[email protected]>

Author: Russell King

drivers/pci/host/pci-mvebu.c

@@ -1075,8 +1075,7 @@ static int mvebu_pcie_probe(struct platform_device *pdev)
 
 	num = of_get_available_child_count(pdev->dev.of_node);
 
-	pcie->ports = devm_kzalloc(&pdev->dev, num *
-				   sizeof(struct mvebu_pcie_port),
+	pcie->ports = devm_kcalloc(&pdev->dev, num, sizeof(*pcie->ports),
 				   GFP_KERNEL);
 	if (!pcie->ports)
 		return -ENOMEM;