[bootloader] Upsilon refereed to as Epsilon 15.5.0

[Alerymin]

Describe the bug
In specific cases, Upsilon is refereed to as Epsilon 15 in the bootloader. It's fixed after a reset

To Reproduce
Steps to reproduce the behavior:

1. Start the bootloader
2. Go to install mode, then flash slots
3. Flash any bootloader compatible Epsilon version
4. The bootloader restarts
5. Go back to flash slots, install Upsilon
6. Unplug the calculator
7. Go back to the main menu (don't press reset)
8. Upsilon is refereed to as Epsilon 15.5.0

Expected behavior
Upsilon named Upsilon

Screenshots

Device (please complete the following information):

• n0110
• bootloader 1.0.6 - FREEDOM.21.1

[Yaya-Cout]

This is because the setup function is not called after exiting DFU.

[Alerymin]

This is because the setup function is not called after exiting DFU.

The wierd thing is that it updates the version number but not the firmware name