ANDROID: align declaration order with upstream

Upstream resolved the conflict of xhci_process_cancelled_tds() and
xhci_stop_endpoint_sync() declarations in a different order and this
causes merge conflicts when backporting more patches. Align with the
declaration order that upstream has.

Cc: Wesley Cheng <quic_wcheng@quicinc.com>
Fixes: 3e516122 ("BACKPORT: xhci: add helper to stop endpoint and wait for completion")
Change-Id: Ief1d0c9b88709464f0565fd5da0755378360623d
Signed-off-by: Carlos Llamas <cmllamas@google.com>