There is a bug in FastRPC when waking from suspend. Since HexagonRPCD is
currently only useful for a few moments when the ADSP is requesting the
sensor registry, it can just be stopped without affecting sensor
support. Add a pre-suspend hook to stop HexagonRPCD so it doesn't crash
the ADSP when the device wakes up.
[ci:skip-build]: already built successfully in CI
Richard Acayan
fe00027849