USBMSD; NFCEEPROM; mbed_compat: Fix compiler warnings

[VeijoPesonen]

Summary of changes

Fixes following compiler warnings:

[Warning] USBMSD.h@266,18: 'USBMSD::_bd' will be initialized after [-Wreorder]
[Warning] USBMSD.h@234,14:   'uint32_t USBMSD::_addr' [-Wreorder]
[Warning] USBMSD.cpp@68,1:   when initialized here [-Wreorder]
[Warning] USBMSD.h@266,18: 'USBMSD::_bd' will be initialized after [-Wreorder]
[Warning] USBMSD.h@234,14:   'uint32_t USBMSD::_addr' [-Wreorder]
[Warning] USBMSD.cpp@81,1:   when initialized here [-Wreorder]

[Warning] NFCEEPROM.h@153,15: 'mbed::nfc::NFCEEPROM::_operation_result' will be initialized after [-Wreorder]
[Warning] NFCEEPROM.h@150,17:   'ac_buffer_t mbed::nfc::NFCEEPROM::_ndef_buffer_reader' [-Wreorder]
[Warning] NFCEEPROM.cpp@23,1:   when initialized here [-Wreorder]

[Warning] mbed_compat.c@81,13: unused variable 'pin' [-Wunused-variable]

Impact of changes

Migration actions required

Documentation

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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)

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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

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Reviewers

@kjbracey-arm

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[ciarmcom]

@VeijoPesonen, thank you for your changes.
@kjbracey-arm @ARMmbed/mbed-os-pan @ARMmbed/mbed-os-hal @ARMmbed/mbed-os-core @ARMmbed/mbed-os-maintainers please review.

[fkjagodzinski]

LGTM

[0xc0170]

CI started

[mbed-ci]

Test run: SUCCESS

Summary: 11 of 11 test jobs passed
Build number : 1
Build artifacts