* [K32W] Code refactor

* remove invalid reference to IPAddress;
* fix typos.

Signed-off-by: Doru Gucea <doru-cristian.gucea@nxp.com>

* [K32W] Enable Thread Joining

Using the SW4 button on the Expansion board, the user can initiate a
Thread session to a Border Router. Thread Commissioning parameters are
hard-coded for the moment but in a future PR these parameters will be
send via BLE.

Signed-off-by: Doru Gucea <doru-cristian.gucea@nxp.com>

* Restyled by clang-format

* Restyled by prettier-markdown

Co-authored-by: Restyled.io <commits@restyled.io>