rp2/modmachine: Fix lightsleep while wifi is powered off.
While cyw43 is deinitialized, an interrupt occurs. That is handled with these lines: ports/rp2/mpnetworkport.c#L59-L61 and as pendsv is disabled while in network code, the poll function then just waits there. When deinit has finished, the poll func is executed, but skipped: src/cyw43_ctrl.c#L222-L225 this skips the `CYW43_POST_POLL_HOOK` which would re-enable interrupts, but also reset `cyw43_has_pending`. And in that state, the lightsleep code, will skip sleeping as it thinks there is a network packet pending to be handled. With this change applied, lightsleep works as expected when the wifi chip is enabled, and when it's powered off.
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@ -146,7 +146,7 @@ STATIC mp_obj_t machine_lightsleep(size_t n_args, const mp_obj_t *args) {
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uint32_t my_interrupts = save_and_disable_interrupts();
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#if MICROPY_PY_NETWORK_CYW43
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if (cyw43_has_pending) {
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if (cyw43_has_pending && cyw43_poll != NULL) {
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restore_interrupts(my_interrupts);
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return mp_const_none;
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}
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