Enable PDP type IPV6 and IPV4V6 to support more cellular service prov…

[felser]

Enable PDP type IPV6 and IPV4V6 to support more cellular service providers

Summary of changes

Adds support for more service providers on Telit radios.
This fixes connectivity failures for MTS_DRAGONFLY_F411RE/F413RH builds that are not using AT&T.

Impact of changes

This affects any cellular platform that uses the Telit radio HE910 code.

Migration actions required

Documentation

None

---

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

Tested the mbed-os-example cellular on LE910 Telit radios with AT&T, Sprint and Verizon carriers. Context ID contained only IPV4, only IPV4V6 or a combination of both. All connections were successful.

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

---

Reviewers

---

[felser]

I'm not sure if this is the best solution or if instead there should be support added separately for LE910 radios. So far this is the only change I have needed to support a range of Telit radios using the mbed included HE910 code. I figured I'd submit the PR and discussions can occur. FYI, I am out of the office the next couple days.

[ciarmcom]

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

[felser]

Is there more you need from me to move this along?

[maclobdell]

@ARMmbed/mbed-os-maintainers can you comment on this?

[mbed-ci]

Jenkins CI Test : ✔️ SUCCESS

Build Number: 1 | 🔒 Jenkins CI Job | 🌐 Logs & Artifacts

CLICK for Detailed Summary

jobs	Status
jenkins-ci/mbed-os-ci_unittests	✔️
jenkins-ci/mbed-os-ci_build-GCC_ARM	✔️
jenkins-ci/mbed-os-ci_build-ARM	✔️
jenkins-ci/mbed-os-ci_greentea-test	✔️
jenkins-ci/mbed-os-ci_dynamic-memory-usage	✔️
jenkins-ci/mbed-os-ci_cloud-client-pytest	✔️