Add initial Beagle Play support

This adds basic Android support for the Beagle Play board.

Boot to HDMI has been tested. The connectivity chip is not enabled for now.

Depends on:

• https://gitlab.baylibre.com/baylibre/ti/ti-u-boot/-/merge_requests/30
• baylibre/ti/android/bootloader/build-bootloaders!26 (merged)

Based on:

• !97 (merged) (baseline)