* Bump buildroot
* buildroot 73991f0fee...5b5dff3136 (1):
> package/linux-firmware: Add RTL8152/8153/8156 firmware
* Enable Realtek 8152/8153/8156 USB Ethernet adapter support
Enable kernel driver and install firmware for Realtek USB Ethernet
adapter. While at it, also enable some other common USB Ethernet
adapters which don't require firmwares.
* Add Amber machine
Introduce a new machine for Amber. Store it under Raspberry Pi boards
since Amber is based on the Raspberry Pi Compute Module 4. This way we
can reuse existing scripts.
* Add kernel patches for Amber
Add kernel patches which add a custom device tree for Amber.
* Add device wipe support via GPIO button
Allow to wipe the device by pressing and holding the red button.
* Enable serial console by default
Enable serial console on the on-board USB-to-UART adapter as well as on
the GPIO header.
* Use 64-bit mode by default
Support only 64-bit for Amber, it is mature enough.
