Issue generating custom image with device tree files for STM32MP257F-DK

[koushik]

I have created basic image with DISTRO=openstlinux-weston MACHINE=stm32mp25-disco, and tried to add device tree files and I have tried to switch to new device tree variant via configuration, and I am planning to emmc to flash the image, I have done integration for all the files in the new device tree folder. Once I try to build with new configuration, I am facing issues during the build process.