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firmware: omnia-mcu-firmware: Bump to 4.1

Marek Behun requested to merge bugfix/omnia-mcu-firmware-bump-to-4.1 into develop

Bump omnia-mcu-firmware to version 4.1.

This version fixes the following issue on boards with GD32 MCU:

  • the user has old GD32 MCU bootloader and application (version 2.0)
  • the user upgraded MCU application firmware to newer version (from 2.99 to 4.0)
  • the user wants to upgrade application again, but it is impossible, because when MCU application firmware jumps into the old MCU bootloader firmware (2.0), the old bootloader firmware gets stuck in exception
  • the user has to restart the board and upgrade the bootloader firmware first, which is not ideal, since if bootloader firmware upgrade is interrupted, the board gets bricked

Therefore the omnia-mcutool utility version 0.3-rc3 will refuse to upgrade MCU application firmware to versions 2.99 to 4.0 if the MCU bootloader firmware is at version 2.0.

For users to be able to upgrade MCU application firmware on GD32 boards, they will need this new 4.1 version.

Users that already upgraded the MCU application firmware to a version between 2.99 and 4.0 (using a previous version of the omnia-mcutool utility) have no other choice but to upgrade MCU bootloader firmware as well.

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