[WIP] Reuse QSPIF Block Device from Wiced driver

[manchoz]

This PR is a tentative fix the QSPIF_BD_ERROR_DEVICE_NOT_UNIQUE = -4006 error at ::begin() because of conflicting instantiation of the QSPIFBlockDevice object on the same QSPIF Device.

[github-actions]

Memory usage change @ 88e9cad

Board	flash	%	RAM for global variables	%
arduino:mbed:envie_m7	💚 -16 - 0	-0.0 - 0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	examples/OTA_Qspi_Flash flash	%	examples/OTA_Qspi_Flash RAM for global variables	%	examples/OTA_SD_Portenta flash	%	examples/OTA_SD_Portenta RAM for global variables	%	examples/OTA_Usage_Portenta flash	%	examples/OTA_Usage_Portenta RAM for global variables	%
arduino:mbed:envie_m7	-16	-0.0	0	0.0	0	0.0	0	0.0	0	0.0	0	0.0

Click for full report CSV

Board,examples/OTA_Qspi_Flash<br>flash,%,examples/OTA_Qspi_Flash<br>RAM for global variables,%,examples/OTA_SD_Portenta<br>flash,%,examples/OTA_SD_Portenta<br>RAM for global variables,%,examples/OTA_Usage_Portenta<br>flash,%,examples/OTA_Usage_Portenta<br>RAM for global variables,%
arduino:mbed:envie_m7,-16,-0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0

[pennam]

qspi_bd is available only since 2.3.1 core. I think that we should go for a safer solution that builds also on old cores. I'm now testing this https://github.com/arduino-libraries/Arduino_Portenta_OTA/compare/main...pennam:qspi_init?expand=1

[manchoz]

Superseded by #12.

Closing.

Thanks @pennam!