PCI: dra7xx: Add __init annotation to dra7xx_add_pcie_port()

Add __init annotation to dra7xx_add_pcie_port(), because
dra7xx_add_pcie_port() is called only by dra7xx_pcie_probe() which is
marked __init.  This patch fixes a section mismatch warning:

WARNING: drivers/pci/host/built-in.o(.text.unlikely+0xcc): Section mismatch in reference from the function dra7xx_add_pcie_port() to the function .init.text:dw_pcie_host_init()
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>

drivers/pci/host/pci-dra7xx.c

@@ -270,8 +270,8 @@ static irqreturn_t dra7xx_pcie_irq_handler(int irq, void *arg)
 	return IRQ_HANDLED;
 }
 
-static int dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
-				struct platform_device *pdev)
+static int __init dra7xx_add_pcie_port(struct dra7xx_pcie *dra7xx,
+				       struct platform_device *pdev)
 {
 	int ret;
 	struct pcie_port *pp;