USB: remove the auto_pm flag

This patch (as1302) removes the auto_pm flag from struct usb_device.
The flag's only purpose was to distinguish between autosuspends and
external suspends, but that information is now available in the
pm_message_t argument passed to suspend methods.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 0d46bbe..8751ec7 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1313,7 +1313,7 @@
 
 	dbg("%s entered", __func__);
 
-	if (serial->dev->auto_pm) {
+	if (message.event & PM_EVENT_AUTO) {
 		spin_lock_irq(&intfdata->susp_lock);
 		b = intfdata->in_flight;
 		spin_unlock_irq(&intfdata->susp_lock);