PCI: dra7xx: Rename add_pcie_port() to dra7xx_add_pcie_port()

The add_pcie_port() function is dra7xx-specific.  Add dra7xx prefix to
avoid collision in global name space.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/pci/host/pci-dra7xx.c

@@ -270,7 +270,7 @@ static irqreturn_t dra7xx_pcie_irq_handler(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
-static int add_pcie_port(struct dra7xx_pcie *dra7xx,
+static int dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
 				struct platform_device *pdev)
 {
 	int ret;
@@ -398,7 +398,7 @@ static int __init dra7xx_pcie_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, dra7xx);
 
-	ret = add_pcie_port(dra7xx, pdev);
+	ret = dra7xx_add_pcie_port(dra7xx, pdev);
 	if (ret < 0)
 		goto err_add_port;