ESP32: watchdog driver

[zephyrbot]

Reported by Leandro Pereira:

ESP32 has 3 watchdog timers. Implement the drivers for them.

(Imported from Jira ZEP-2296)

[zephyrbot]

by Leandro Pereira:

Wrote the watchdog driver today. Will send for review when the issue with interrupt routines is fixed.

(Note to self: create issue to improve watchdog documentation. It's not documented at all, and the interface is a 1:1 mapping to QMSI, which doesn't make sense for anything other than the Quark MCUs supported by that library. There's no abstraction for the modes and timeout values, so the ESP32 driver sort of adapts to handle things in a way that's similar to D2000.)

[zephyrbot]

by Leandro Pereira:

#724

[zephyrbot]

by Mark Linkmeyer:

Since Leandro is now on vacation I'm reassigning this to Andy Ross to finish driving it to the Merged state before the 1.9 Feature Merge Window closes next week. Thanks for the help Andy!

[zephyrbot]

by Chandrakala Kempanna:

Nirmala Devi M Please Verify the Story

[zephyrbot]

by Nirmala Devi M:

Tested and verified esp32 watchdog for Reset mode and Interrupt reset mode and it is working fine.