This patches removes 'CONFIG_WDT_DW=y' so we rely on the platform's
default option for the watchdog driver. This way the watchdog sample
application can be built for different platforms without changing
the configuration file.
Change-Id: I4fa0f8e1f34a4608d602b6a5120fa1818b94aa6a
Signed-off-by: Andre Guedes <andre.guedes@intel.com>