Partial revert of xhci: use pm_ptr() instead #ifdef for CONFIG_PM conditionals

commit 448fe5a1a4b538b235a43e57863c3a078bd13b01 upstream.

commit 9734fd7a2777 ("xhci: use pm_ptr() instead of #ifdef for CONFIG_PM
conditionals") did not quite work properly in the 5.15.y branch where it was
applied to fix a build error when CONFIG_PM was set as it left the following
build errors still present:

	ERROR: modpost: "xhci_suspend" [drivers/usb/host/xhci-pci.ko] undefined!
	ERROR: modpost: "xhci_resume" [drivers/usb/host/xhci-pci.ko] undefined!

Fix this up by properly placing the #ifdef CONFIG_PM in the xhci-pci.c and
hcd.h files to handle this correctly.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ron Economos <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reported-by: Guenter Roeck <[email protected]>
[ Trimmed the partial revert down to an even smaller bit to only be what
  is required to fix the build error - gregkh]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
(cherry picked from commit 4b7032d01ea1fd7bae1f5ce008aaf25f4857d07f)
Signed-off-by: Alok Tiwari <[email protected]>

Author: drmpeg

drivers/usb/host/xhci-pci.c

@@ -521,6 +521,7 @@ static void xhci_pci_remove(struct pci_dev *dev)
 	usb_hcd_pci_remove(dev);
 }
 
+#ifdef CONFIG_PM
 /*
  * In some Intel xHCI controllers, in order to get D3 working,
  * through a vendor specific SSIC CONFIG register at offset 0x883c,
@@ -661,6 +662,7 @@ static void xhci_pci_shutdown(struct usb_hcd *hcd)
 	if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
 		pci_set_power_state(pdev, PCI_D3hot);
 }
+#endif /* CONFIG_PM */
 
 /*-------------------------------------------------------------------------*/
 
@@ -694,9 +696,11 @@ static struct pci_driver xhci_pci_driver = {
 static int __init xhci_pci_init(void)
 {
 	xhci_init_driver(&xhci_pci_hc_driver, &xhci_pci_overrides);
+#ifdef CONFIG_PM
 	xhci_pci_hc_driver.pci_suspend = xhci_pci_suspend;
 	xhci_pci_hc_driver.pci_resume = xhci_pci_resume;
 	xhci_pci_hc_driver.shutdown = xhci_pci_shutdown;
+#endif
 	return pci_register_driver(&xhci_pci_driver);
 }
 module_init(xhci_pci_init);