usb: hcd: Add USB atomic notifier callback for HC died error

Add support for USB atomic notifier callbacks when host controller
drivers reports death of controller on some fatal error.
Current implementation doesn't help to recover from this condition.
Controller platform drivers can register for this callback and take
necessary steps to reset and add hcd again.

CRs-fixed: 1048766
Change-Id: Ie9064e669424096fee8c35cddccab29faf60cc6b
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>