Configuring PMIC LDO's for OV7251 failing with "voltage operation not allowed"

Hey,
Why I am not able to use PMIC LDO’s for my sensor usecase? Is it needed to make changes in tz and rpm? I am using tz, rpm and other bootloader files from “dragonboard-820c-bootloader-ufs-linux-30” package.

Best Regards,
Jox