[feature-wisun] Nanostack: Add config for Wi-SUN device type

[artokin]

Summary of changes

Add configuration option for Wi-SUN device types. This PR cherry-pick changes from #12648 to the feature-wisun branch.

Impact of changes

Migration actions required

Documentation

---

Pull request type

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

---

Test results

[] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

---

Reviewers

@ARMmbed/mbed-os-mesh @teetak01

---

[ciarmcom]

@artokin, thank you for your changes.
@teetak01 @ARMmbed/mbed-os-maintainers please review.

[0xc0170]

CI started

[mbed-ci]

Test run: FAILED

Summary: 1 of 8 test jobs failed
Build number : 1
Build artifacts

Failed test jobs:

• jenkins-ci/mbed-os-ci_greentea-test

[artokin]

There are 60 failures, 379 skipped and 5,266 tests in the greentea test results. The failures seems to happen in sleep and USB features.

In the previous PR to feature-wisun branch (#12562) there were 12 failures, 6 skipped and 4,345 tests. The failing tests were all sleep related.

@0xc0170 , there has been a lot of changes in the greentea test set. Should we include some fixes from the Mbed OS master to this feature-wisun branch to get more test passing? Or are the failing tests acceptable for the feature branch.

[artokin]

Agreed with @0xc0170 , test failures are acceptable for this feature-branch.

[0xc0170]

USB has been also on master the last week once, I'll review today other Prs if this is master issue.

sleep should be fixed on the branch to make test pass and make Prs green to process PR faster