Update watchdog drivers to use DT_HAS_<compat>_ENABLED Kconfig symbol
to expose the driver and enable it by default based on devicetree.
We remove 'depend on' Kconfig for symbols that would be implied by
the devicetree node existing.
Signed-off-by: Kumar Gala <galak@kernel.org>
Watchdog type is found on e.g. Pearl/Jade Gecko, often
more than 1 is present.
Driver supports timeout and (minimum) window configuration
and reset or timeout interrupt support for now.
Signed-off-by: Oane Kingma <o.kingma@interay.com>