split: bb-u-boot-beagleboneai64-debian-11 and bb-u-boot-beagleboneai64-debian-12

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

bb-u-boot-beagleboneai64-debian-12/readme.log

+  * 20230222 - 08.06.00.007 - https://git.ti.com/gitweb?p=processor-firmware/ti-linux-firmware.git;a=commit;h=2944354aca1f95525c30d625cb17672930e72572
+  * 20230522 - v2.9.0 - https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/log/?h=v2.9.0
+  * 20230707 - 3.22.0 - https://github.com/OP-TEE/optee_os/commits/3.22.0
+  * BeagleBone AI64, add extlinux.conf boot options over serial
+  * Bump FAT partition to 256MB for boot recovery images
+  * Enable a extlinux.conf option to flash other media directly
+  * extlinux.conf more vocal on eMMC vs microSD
+  * add homeassistant specific extlinux.conf files
+  * Flasher scripts, echo Serial over HDMI
+  * extlinux.conf, unify labels to make flasher change more generic