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After nrfx 1.0.0 a new macro was introduced to do a common hardware timeout. The macro function triggers a counter of retries or a timeout in us. However, in many cases, like in nrfx_adc.c the timeout value is set to 0, leading to a infinite loop in mp_hal_delay_us. This patch prevents this from happening. Path of error: nrfx_adc.c -> NRFX_WAIT_FOR -> NRFX_DELAY_US -> mp_hal_delay_us.