counter: intel-qep: Mark PM callbacks with __maybe_unused

Remove CONFIG_PM ifdef and mark PM callbacks with __maybe_unused.

Suggested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20210611115558.796338-1-jarkko.nikula@linux.intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/counter/intel-qep.c

@@ -473,8 +473,7 @@ static void intel_qep_remove(struct pci_dev *pci)
 	intel_qep_writel(qep, INTEL_QEPCON, 0);
 }
 
-#ifdef CONFIG_PM
-static int intel_qep_suspend(struct device *dev)
+static int __maybe_unused intel_qep_suspend(struct device *dev)
 {
 	struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
 	struct intel_qep *qep = pci_get_drvdata(pdev);
@@ -486,7 +485,7 @@ static int intel_qep_suspend(struct device *dev)
 	return 0;
 }
 
-static int intel_qep_resume(struct device *dev)
+static int __maybe_unused intel_qep_resume(struct device *dev)
 {
 	struct pci_dev *pdev = container_of(dev, struct pci_dev, dev);
 	struct intel_qep *qep = pci_get_drvdata(pdev);
@@ -512,7 +511,6 @@ static int intel_qep_resume(struct device *dev)
 
 	return 0;
 }
-#endif
 
 static UNIVERSAL_DEV_PM_OPS(intel_qep_pm_ops,
 			    intel_qep_suspend, intel_qep_resume, NULL);