wil6210: fix build warnings without CONFIG_PM

The #ifdef checks are hard to get right, in this case some functions
should have been left inside a CONFIG_PM_SLEEP check as seen by this
message:

drivers/net/wireless/ath/wil6210/pcie_bus.c:489:12: error: 'wil6210_pm_resume' defined but not used [-Werror=unused-function]
drivers/net/wireless/ath/wil6210/pcie_bus.c:484:12: error: 'wil6210_pm_suspend' defined but not used [-Werror=unused-function]

Using an __maybe_unused is easier here, so I'm replacing all the
other #ifdef in this file as well for consistency.

Fixes: 9416266 ("wil6210: run-time PM when interface down")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/wil6210/pcie_bus.c

@@ -31,10 +31,8 @@ static bool ftm_mode;
 module_param(ftm_mode, bool, 0444);
 MODULE_PARM_DESC(ftm_mode, " Set factory test mode, default - false");
 
-#ifdef CONFIG_PM
 static int wil6210_pm_notify(struct notifier_block *notify_block,
 			     unsigned long mode, void *unused);
-#endif /* CONFIG_PM */
 
 static
 void wil_set_capabilities(struct wil6210_priv *wil)
@@ -307,15 +305,15 @@ static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		goto bus_disable;
 	}
 
-#ifdef CONFIG_PM
-	wil->pm_notify.notifier_call = wil6210_pm_notify;
+	if (IS_ENABLED(CONFIG_PM))
+		wil->pm_notify.notifier_call = wil6210_pm_notify;
+
 	rc = register_pm_notifier(&wil->pm_notify);
 	if (rc)
 		/* Do not fail the driver initialization, as suspend can
 		 * be prevented in a later phase if needed
 		 */
 		wil_err(wil, "register_pm_notifier failed: %d\n", rc);
-#endif /* CONFIG_PM */
 
 	wil6210_debugfs_init(wil);
 
@@ -346,9 +344,7 @@ static void wil_pcie_remove(struct pci_dev *pdev)
 
 	wil_dbg_misc(wil, "pcie_remove\n");
 
-#ifdef CONFIG_PM
 	unregister_pm_notifier(&wil->pm_notify);
-#endif /* CONFIG_PM */
 
 	wil_pm_runtime_forbid(wil);
 
@@ -372,8 +368,6 @@ static const struct pci_device_id wil6210_pcie_ids[] = {
 };
 MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);
 
-#ifdef CONFIG_PM
-
 static int wil6210_suspend(struct device *dev, bool is_runtime)
 {
 	int rc = 0;
@@ -481,17 +475,17 @@ static int wil6210_pm_notify(struct notifier_block *notify_block,
 	return rc;
 }
 
-static int wil6210_pm_suspend(struct device *dev)
+static int __maybe_unused wil6210_pm_suspend(struct device *dev)
 {
 	return wil6210_suspend(dev, false);
 }
 
-static int wil6210_pm_resume(struct device *dev)
+static int __maybe_unused wil6210_pm_resume(struct device *dev)
 {
 	return wil6210_resume(dev, false);
 }
 
-static int wil6210_pm_runtime_idle(struct device *dev)
+static int __maybe_unused wil6210_pm_runtime_idle(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 	struct wil6210_priv *wil = pci_get_drvdata(pdev);
@@ -501,12 +495,12 @@ static int wil6210_pm_runtime_idle(struct device *dev)
 	return wil_can_suspend(wil, true);
 }
 
-static int wil6210_pm_runtime_resume(struct device *dev)
+static int __maybe_unused wil6210_pm_runtime_resume(struct device *dev)
 {
 	return wil6210_resume(dev, true);
 }
 
-static int wil6210_pm_runtime_suspend(struct device *dev)
+static int __maybe_unused wil6210_pm_runtime_suspend(struct device *dev)
 {
 	struct pci_dev *pdev = to_pci_dev(dev);
 	struct wil6210_priv *wil = pci_get_drvdata(pdev);
@@ -518,15 +512,12 @@ static int wil6210_pm_runtime_suspend(struct device *dev)
 
 	return wil6210_suspend(dev, true);
 }
-#endif /* CONFIG_PM */
 
 static const struct dev_pm_ops wil6210_pm_ops = {
-#ifdef CONFIG_PM
 	SET_SYSTEM_SLEEP_PM_OPS(wil6210_pm_suspend, wil6210_pm_resume)
 	SET_RUNTIME_PM_OPS(wil6210_pm_runtime_suspend,
 			   wil6210_pm_runtime_resume,
 			   wil6210_pm_runtime_idle)
-#endif /* CONFIG_PM */
 };
 
 static struct pci_driver wil6210_driver = {

drivers/net/wireless/ath/wil6210/wil6210.h

@@ -742,9 +742,7 @@ struct wil6210_priv {
 
 	int fw_calib_result;
 
-#ifdef CONFIG_PM
 	struct notifier_block pm_notify;
-#endif /* CONFIG_PM */
 
 	bool suspend_resp_rcvd;
 	bool suspend_resp_comp;