STM32H7: USE_SD_TRANSCEIVER is configurable

[pennam]

Summary of changes

This pull request allow configuration of USE_SD_TRANSCEIVER using targets.json file

        "sd_transceiver_available": {
            "help": "Define if SD transceiver is available on the board.",
            "value": true
        }

Default value for STM32H7 targets is 1but can be changed using override section of a specific target.

        "overrides": {
            "sd_transceiver_available": false
        },

Impact of changes

STM32H7 family

Migration actions required

Documentation

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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)
[] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

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Reviewers

@facchinm

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[pennam]

@facchinm i've aligned this branch to this https://github.com/arduino/mbed-os/tree/config_sd_transceiver so you can have a look at the changes. If you agree i will then close this and open a pull request to ARMmbed/mbed-os.

[facchinm]

I think this one can be opened on mbed-os as is 😉
Thx

[pennam]

Rebased and mainlined as ARMmbed#14145

[pennam]

Closing because ARMmbed#14145 has been merged