how to enable Extended Operating Temperature on nRF52833 using NCS 2.6.1?

[LongQi]

	NRF_CLOCK->LFXODEBOUNCE = (CLOCK_LFXODEBOUNCE_LFXODEBOUNCE_Extended << CLOCK_LFXODEBOUNCE_LFXODEBOUNCE_Pos);

is this enough? Could you share the example code if it is not?