usb: dwc2: Fix build warning when CONFIG_PM_SLEEP=n

Building with bcm2835_defconfig, which has CONFIG_PM_SLEEP=n causes the
following build warning:

drivers/usb/dwc2/platform.c:227:12: warning: 'dwc2_suspend' defined but not used [-Wunused-function]
drivers/usb/dwc2/platform.c:237:12: warning: 'dwc2_resume' defined but not used [-Wunused-function]

Annotate these functions with '__maybe_unused' to prevent the warnings.

Reported-by: Olof's autobuilder <build@lixom.net>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index ec5658ac52ba..6a795aa2ff05 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -226,7 +226,7 @@ static int dwc2_driver_probe(struct platform_device *dev)
         return retval;
 }
 
-static int dwc2_suspend(struct device *dev)
+static int __maybe_unused dwc2_suspend(struct device *dev)
 {
         struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
         int ret = 0;
@@ -236,7 +236,7 @@ static int dwc2_suspend(struct device *dev)
         return ret;
 }
 
-static int dwc2_resume(struct device *dev)
+static int __maybe_unused dwc2_resume(struct device *dev)
 {
         struct dwc2_hsotg *dwc2 = dev_get_drvdata(dev);
         int ret = 0;