Merge tag 'rpi-2025.04-rc4' of https://source.denx.de/u-boot/custodians/u-boot-raspberrypi

Updates for RPi for 2025.04:

- Copy Bluetooth device address in DT
- Keep warnings from firmware in DT, if any
- Only add frame buffer node if CONFIG_FDT_SIMPLEFB is set
- Add identifiers for the new RPi 5 series