UHCI: support device_may_wakeup

This patch (as831) adds device_may_wakeup() support to uhci-hcd; it
has been lacking for a long time.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/uhci-hcd.c

@@ -257,7 +257,9 @@ __acquires(uhci->lock)
 	int_enable = USBINTR_RESUME;
 	if (remote_wakeup_is_broken(uhci))
 		egsm_enable = 0;
-	if (resume_detect_interrupts_are_broken(uhci) || !egsm_enable)
+	if (resume_detect_interrupts_are_broken(uhci) || !egsm_enable ||
+			!device_may_wakeup(
+				&uhci_to_hcd(uhci)->self.root_hub->dev))
 		uhci->working_RD = int_enable = 0;
 
 	outw(int_enable, uhci->io_addr + USBINTR);