iot2050: Enable watchdog support, but do not auto-start it
This allows to use the watchdog in custom scripts but does not enforce
that the OS has to support it as well.
Signed-off-by: 
Jan Kiszka <jan.kiszka@siemens.com>
This allows to use the watchdog in custom scripts but does not enforce
that the OS has to support it as well.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>