As LS1012AFRWY has only 2 MB QSPI flash, rootfs cannot fit into the firmware image on the QSPI flash memory. You need to load the TinyDistroby tftp or sd/usb device. => tftp 0x92000000 tftp_path/lsdk2108_yocto_tiny_LS_arm64.itb; pfe stop; bootm 0x92000000#ls1012afrwy
You could download lsdk2108_yocto_tiny_LS_arm64.itb with the following command.