f85f42f997
Add a driver for the TI watchdog. The TI watchdog timer is present on BeagleBone's. Since 2014, U-Boot has been booting the BeagleBone with the watchdog enabled. We need to disable it on boot to avoid a spurious reset. The timer isn't exactly precise, but it will do as a watchdog. This is also a reflection of the watchdog(9) API. In the future, we could handle interrupts, but the watchdog(9) API needs to be a bit smarter before that can happen.