fix: 修复pm编译告警导致内核编译失败

Close #I49MIN
Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: I6b448790b170bf5980d16698ecfff27bda6c3600

components/power/los_pm.c

@@ -167,7 +167,7 @@ STATIC Suspend OsPmCpuSuspend(LosPmCB *pm)
 
 STATIC UINT32 OsPmSuspendSleep(LosPmCB *pm)
 {
-    UINT32 ret;
+    UINT32 ret = LOS_OK;
     UINT32 intSave;
     LOS_SysSleepEnum mode;
     Suspend sysSuspend = NULL;