NRF52 hal_watchdog_init() doesn't fulfil interface

[rafacouto]

Watchdog HAL documentation, function hal_watchdog_init() says it returns expiration time as positive value.

However, nrf52 implementation returns always 0.

Is the documentation wrong? the implementation?

// test assertion
assert(hal_watchdog_init(1000) > 0);

[sjanc]

looks like documentation needs to be updated, I've checked few random MCUs and all return 0 on success