[PATCH net-next] sun/cassini: mark cas_resume() as __maybe_unused

[Wei Yongjun]

In certain configurations without power management support, gcc report
the following warning:

drivers/net/ethernet/sun/cassini.c:5206:12: warning:
 'cas_resume' defined but not used [-Wunused-function]
 5206 | static int cas_resume(struct device *dev_d)
      |            ^~~~~~~~~~

Mark cas_resume() as __maybe_unused to make it clear.

Fixes: f193f4ebde3d ("sun/cassini: use generic power management")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Wei Yongjun <weiyongj...@huawei.com>
---
 drivers/net/ethernet/sun/cassini.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/sun/cassini.c 
b/drivers/net/ethernet/sun/cassini.c
index 95c07cc84053..e04c3d73a246 100644
--- a/drivers/net/ethernet/sun/cassini.c
+++ b/drivers/net/ethernet/sun/cassini.c
@@ -5203,7 +5203,7 @@ static int __maybe_unused cas_suspend(struct device 
*dev_d)
        return 0;
 }
 
-static int cas_resume(struct device *dev_d)
+static int __maybe_unused cas_resume(struct device *dev_d)
 {
        struct net_device *dev = dev_get_drvdata(dev_d);
        struct cas *cp = netdev_priv(dev);