USB: add power/level sysfs attribute

This patch (as874) adds another piece to the user-visible part of the
USB autosuspend interface.  The new power/level sysfs attribute allows
users to force the device on (with autosuspend off), force the device
to sleep (with autoresume off), or return to normal automatic operation.

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

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index f08ec85..739f520 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -42,7 +42,7 @@
 {
 #ifdef	CONFIG_USB_SUSPEND
 	/* disable autosuspend, but allow the user to re-enable it via sysfs */
-	udev->autosuspend_delay = 0;
+	udev->autosuspend_disabled = 1;
 #endif
 }