Overlay to enable GPMC on BBB

Hi, I would love to enable GPMC configuration of beaglebone black. I downloded the last TI kernel 5.10 but I did not found the dtbo to enable GPMC in dtbo archive. Where can I found a valid dtbo to enable GPMC on kernel 5.10? I also looked on older kernel version but it seems GPMC dtbo is never available.