feat(fdts): add support for STM32MP257D-based ultra-fly-sbc board

This commit adds support for the ultra-fly-sbc board, a rapid proto-
typing reference board developed by Ultratronik GmbH. It features an
STM32MP257D SoC with 4 GiB LPDDR4, 8 GiB eMMC, and a microSD slot.

The board includes various UART, USB, SPI, and I2C ports/headers,
along with a multipurpose E-Key M.2 connector and two Microbus headers.
Additionally, the board supports LVDS, parallel, and MIPI-DSI video
output.

These DTS(i) files are based on the STM32MP257F-DK board.

TF-A has been fully tested on this board with the latest OP-TEE
developer setup.

Change-Id: I8fdc7fe570d9c5d37eb59e76808c3b1e5b708bc2
Signed-off-by: Boerge Struempfel <boerge.struempfel@gmail.com>
3 files changed