rp2/mpthreadport: Ensure core1 doesn't hold gc lock in deinit.

Prior to this commit the following code would lock up the device when
Ctrl-D is entered at the REPL:

    import gc, _thread

    def collect_thread():
        while True:
            gc.collect()

    _thread.start_new_thread(collect_thread, [])

Fixes part of #8494.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

0 files changed, 0 insertions, 0 deletions