Make FW16 BIOS 3.0.5 downgradable back to BIOS 3.0.3

[jcdutton]

Device Information

System Model or SKU

• Framework Laptop 16 (AMD Ryzen™ 7040 Series)

BIOS VERSION

3.0.5

Linux:
Open a terminal and run the following command
sudo dmidecode --string bios-version
03.05

DIY Edition information

Memory: Manufacture and SKU
Kingston Fury Impact: Part Number: KF556S40-32
2x making 64GB total.
Storage: Manufacture and SKU
Model Number: WD_BLACK SN850X 1000GB
Firmware Version: 620361WD

Port/Peripheral information

1. USB-C card, nothing plugged in.
2. Empty
3. Empty
4. Empty
5. USB-C card, FW16 Power brick plugged in.
6. USB-A card, nothing plugged in.

Standalone Operation

Are you running your mainboard as a standalone device. Is standalone mode enabled in the BIOS?

• No

Describe the bug

The FW16 AMD BIOS 3.0.5 is published as being non-downgradable.
This makes it next to impossible to test the upgrade process because one cannot downgrade to redo the test.

Steps To Reproduce

The non-downgradability is mentioned in the release notes.

Expected behavior

It should be downgradable, so users can back-out if it causes problems.

Screenshots

N/A

Operating System (please complete the following information):

• OS/Distribution: Linux/Ubuntu
• Version: 24.04
• Linux Kernel Version: uname -a 6.12.0 <- Mainline compiled kernel.

Additional context

N/A