unify the image creation into a single script sharing the same rootfs

.gitlab-ci.yml

README-BOOT-a311d.md

emulate.sh

mkimage.sh

reform2-a311d/boot/bananapi-cm4-mnt-reform2_defconfig

reform2-a311d/boot/dts-makefile.patch

reform2-a311d/boot/meson-g12b-bananapi-cm4-mnt-reform2.dts

reform2-a311d/flash.bin

reform2-a311d/mkimage.sh

reform2-a311d/mkuserland.sh

reform2-common/userland-common.sh

reform2-imx8mq/.gitignore

reform2-imx8mq/cleanup.sh

reform2-imx8mq/emulate.sh

reform2-imx8mq/flash-image.sh

reform2-imx8mq/mkimage.sh

reform2-imx8mq/mkreform-tools.sh

reform2-imx8mq/mkuserland.sh

reform2-imx8mq/mkuserland3.sh

reform2-imx8mq/mount-img.sh