Bluetooth: hci_bcm: Clean up unnecessary #ifdef

pm_runtime_disable() and pm_runtime_set_suspended() are replaced with
empty inlines if CONFIG_PM is disabled, so there's no need to #ifdef
them.

device_init_wakeup() is likewise replaced with an inline, though it's
not empty, but it and devm_free_irq() can be made conditional on
IS_ENABLED(CONFIG_PM), which is preferable to #ifdef as per section 20
of Documentation/process/coding-style.rst.

Cc: Frédéric Danis <frederic.danis.oss@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/hci_bcm.c

@@ -373,15 +373,13 @@ static int bcm_close(struct hci_uart *hu)
 
 	if (bdev) {
 		bcm_gpio_set_power(bdev, false);
-#ifdef CONFIG_PM
 		pm_runtime_disable(bdev->dev);
 		pm_runtime_set_suspended(bdev->dev);
 
-		if (bdev->irq > 0) {
+		if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) {
 			devm_free_irq(bdev->dev, bdev->irq, bdev);
 			device_init_wakeup(bdev->dev, false);
 		}
-#endif
 	}
 	mutex_unlock(&bcm_device_lock);