dmaengine: sirf: Add CONFIG_PM_SLEEP to suspend/resume functions

Add CONFIG_PM_SLEEP to suspend/resume functions to fix the following
build warning when CONFIG_PM_SLEEP is not selected. This is because
sleep PM callbacks defined by SET_SYSTEM_SLEEP_PM_OPS are only used
when the CONFIG_PM_SLEEP is enabled.

drivers/dma/sirf-dma.c:838:12: warning: 'sirfsoc_dma_pm_suspend' defined but not used [-Wunused-function]
drivers/dma/sirf-dma.c:879:12: warning: 'sirfsoc_dma_pm_resume' defined but not used [-Wunused-function]

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/sirf-dma.c

@@ -834,6 +834,7 @@ static int sirfsoc_dma_runtime_resume(struct device *dev)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
 static int sirfsoc_dma_pm_suspend(struct device *dev)
 {
 	struct sirfsoc_dma *sdma = dev_get_drvdata(dev);
@@ -915,6 +916,7 @@ static int sirfsoc_dma_pm_resume(struct device *dev)
 
 	return 0;
 }
+#endif
 
 static const struct dev_pm_ops sirfsoc_dma_pm_ops = {
 	SET_RUNTIME_PM_OPS(sirfsoc_dma_runtime_suspend, sirfsoc_dma_runtime_resume, NULL)