[PATCH] usb: musb: fix compilation warning on unused function

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The function musb_run_resume_work is called only when CONFIG_PM is
enabled. So this function should not be defined when CONFIG_PM is
disabled. Otherwise the compiler issues a warning:

drivers/usb/musb/musb_core.c:2057:12: error: ‘musb_run_resume_work’ defined but
not used [-Werror=unused-function]
 static int musb_run_resume_work(struct musb *musb)
            ^~~~~~~~~~~~~~~~~~~~

Signed-off-by: Jérémy Lefaure <jeremy.lefaure@xxxxxxxxxxxx>
---

I think that adding a preprocessor condition is a better way to fix this than
moving the function into the scope of the existing condition to preserve the
git history.

 drivers/usb/musb/musb_core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 9e22646..fca288bb 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -2050,6 +2050,7 @@ struct musb_pending_work {
 	struct list_head node;
 };
 
+#ifdef CONFIG_PM
 /*
  * Called from musb_runtime_resume(), musb_resume(), and
  * musb_queue_resume_work(). Callers must take musb->lock.
@@ -2077,6 +2078,7 @@ static int musb_run_resume_work(struct musb *musb)
 
 	return error;
 }
+#endif
 
 /*
  * Called to run work if device is active or else queue the work to happen
-- 
2.10.2

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