RP2040/235x: Add I2C bus lockup detection and async recovery implementation. #4908
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Various possibilities for bus-lock exist with the rp2040 and rp2350 i2c peripherals. The synopsis i2c peripheral is not included with the bus-clear option, meaning detection and recovery has to be implemented in software.
This change adds detection of these conditions to both blocking and async usage, and bit-banged automatic recovery for the async variants.