RZ_A1H remove usage of ethernet hal API

[RyoheiHagimoto]

[RZ_A1H] remove usage of ethernet hal API

Summary of changes

• Removed ethernet_api from targets\TARGET_RENESAS\TARGET_RZ_A1XX.
• Modified features\netsocket\emac-drivers\TARGET_RZ_A1_EMAC not to use ethernet_api.

Impact of changes

Migration actions required

Documentation

The fix is related to the PR here:
#12639

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Pull request type

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

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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

rz_a1h-tests.zip

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Reviewers

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[toyowata]

cc @rajkan01

[ciarmcom]

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

[0xc0170]

CI started

[mbed-ci]

Test run: FAILED

Summary: 1 of 6 test jobs failed
Build number : 1
Build artifacts

Failed test jobs:

• jenkins-ci/mbed-os-ci_cloud-client-pytest

[0xc0170]

cloud client test not related to this PR, tracking issue was created internally