clocksource/drivers/timer-tegra186: Add support for Tegra234 SoC

The timer IP block present on Tegra234 SoC supports watchdog timer
functionality that can be used to recover from system hangs. The
watchdog timer uses a timer in the background for countdown.

Signed-off-by: Kartik <kkartik@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/1656922422-25823-4-git-send-email-kkartik@nvidia.com


Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>