Revert "xhci: clear usb2 resume related variables in one place."

This reverts commit 8af9de2a which is
commit 0e627545 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: I460623476ce9205201b40cd2914636abcb91d5d3
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>