pwm: lpss: drop redundant runtime PM handles

We no longer need empty runtime PM handles for PCI devices after
commits [1] and [2]. Drop them and let PCI core take care of power
state transitions.

[1] c5eb1190 ("PCI / PM: Allow runtime PM without callback functions")
[2] fa885b06 ("PCI/PM: Allow runtime PM with no PM callbacks at all")
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Link: https://lore.kernel.org/r/20240605131533.20037-3-raag.jadav@intel.comSigned-off-by: Uwe Kleine-König <ukleinek@kernel.org>

drivers/pwm/pwm-lpss-pci.c

@@ -46,25 +46,6 @@ static void pwm_lpss_remove_pci(struct pci_dev *pdev)
 	pm_runtime_get_sync(&pdev->dev);
 }
 
-static int pwm_lpss_runtime_suspend_pci(struct device *dev)
-{
-	/*
-	 * The PCI core will handle transition to D3 automatically. We only
-	 * need to provide runtime PM hooks for that to happen.
-	 */
-	return 0;
-}
-
-static int pwm_lpss_runtime_resume_pci(struct device *dev)
-{
-	return 0;
-}
-
-static DEFINE_RUNTIME_DEV_PM_OPS(pwm_lpss_pci_pm,
-				 pwm_lpss_runtime_suspend_pci,
-				 pwm_lpss_runtime_resume_pci,
-				 NULL);
-
 static const struct pci_device_id pwm_lpss_pci_ids[] = {
 	{ PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
 	{ PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
@@ -84,9 +65,6 @@ static struct pci_driver pwm_lpss_driver_pci = {
 	.id_table = pwm_lpss_pci_ids,
 	.probe = pwm_lpss_probe_pci,
 	.remove = pwm_lpss_remove_pci,
-	.driver = {
-		.pm = pm_ptr(&pwm_lpss_pci_pm),
-	},
 };
 module_pci_driver(pwm_lpss_driver_pci);