Revert "xhci: rename resume_done to resume_timestamp"

This reverts commit a99c8f1a which is
commit a909d629 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: Ic40510cd8c94739404a7e3c2532fa460bf7f7fb4
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>