STM32H7: add NUCLEO_H7A3ZI_Q new target

[jeromecoutant]

Summary of changes

PR on top of #13690

Creation of:

• MCU_STM32H7A3xIQ generic target
• NUCLEO_H7A3ZI_Q new target

https://www.st.com/en/evaluation-tools/nucleo-h7a3zi-q.html
https://os.mbed.com/platforms/ST-Nucleo-H7A3ZI-Q/

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

---

[ciarmcom]

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

[JojoS62]

I had opened an issue about the H743 and USB, is USB working with this new version?
#13641

I will get the Nucleo H743ZI_Q in a few days and can test it also.

Edit:
its a H7A3, OMG, so many different. I wanted to order a H743, the Nucleo H7A3 has no ethernet fitted.

[jeromecoutant]

I had opened an issue about the H743 and USB, is USB working with this new version?

Sorry, I didn't check this yet....

[0xc0170]

PR on top of #13690

Still waiting for this one to be merged

[mergify]

This PR cannot be merged due to conflicts. Please rebase to resolve them.

[jeromecoutant]

Waiting for #13690

[mergify]

This PR cannot be merged due to conflicts. Please rebase to resolve them.

[0xc0170]

@jeromecoutant Rebase and ready for CI? The dependency PR was merged

[jeromecoutant]

Conflicts solved!

[0xc0170]

CI started

[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-greentea-GCC_ARM	✔️
jenkins-ci/mbed-os-ci_build-greentea-ARM	✔️
jenkins-ci/mbed-os-ci_build-cloud-example-ARM	✔️
jenkins-ci/mbed-os-ci_build-cloud-example-GCC_ARM	✔️
jenkins-ci/mbed-os-ci_build-example-ARM	✔️
jenkins-ci/mbed-os-ci_build-example-GCC_ARM	✔️
jenkins-ci/mbed-os-ci_greentea-test	✔️
jenkins-ci/mbed-os-ci_dynamic-memory-usage	✔️
jenkins-ci/mbed-os-ci_cloud-client-pytest	✔️