powerpc/fsl-pci: fix warning when CONFIG_SWIOTLB is disabled

Fix the following warning:
arch/powerpc/sysdev/fsl_pci.c: In function 'fsl_pci_probe':
arch/powerpc/sysdev/fsl_pci.c:867:25: error: unused variable 'hose'
Signed-off-by: NJia Hongtao <B38951@freescale.com>
Acked-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/sysdev/fsl_pci.c

@@ -864,7 +864,9 @@ static int __devinit fsl_pci_probe(struct platform_device *pdev)
 {
 	int ret;
 	struct device_node *node;
+#ifdef CONFIG_SWIOTLB
 	struct pci_controller *hose;
+#endif
 
 	node = pdev->dev.of_node;
 	ret = fsl_add_bridge(node, fsl_pci_primary == node);