Notes
- 115200 baud
- Debug UART is on GPIO
- Has fix for "MMC: No card present" (CONFIG_MMC0_CD_PIN="")

Version Information
u-boot: git checkout v2022.07

Toolchain Information
u-boot: arm-gnu-toolchain-11.3.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz

Flashing To MMC:
dd if=u-boot-sunxi-with-spl.bin of=<device> bs=1024 seek=8