Resolved! Building and deploying the U-Boot for the first time.
Hi,root@si-rd22:/home/developer-package/stm32mp1-openstlinux-5.10-dunfell-mp1-21-03-31/sources/arm-ostl-linux-gnueabi/u-boot-stm32mp-2020.10.r1-r0/u-boot-stm32mp-2020.10.r1# make stm32mp15_defconfigMakefile:40: *** missing separator. Stop.can anyone ...