dts: xtensa: intel_adsp: Set soft-off state as disabled

The 'soft-off' state must be used when explicitly request by calling
`pm_state_force`. Set this state as disabled in dts ensures that the
pm policy manager will not use this state.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>

dts/xtensa/intel/intel_adsp_cavs25.dtsi

@@ -50,8 +50,9 @@
  d3: off {
  compatible = "zephyr,power-state";
  power-state-name = "soft-off";
- min-residency-us = <2147483647>;
+ min-residency-us = <0>;
  exit-latency-us = <0>;
+ status = "disabled";
  };
  };
  };