Bios Mods -The Best BIOS Update and Modification Source

Hello!
Can someone help me and add or open up MBR/Legacy support on latest bios?
https://drivers.amd.com/drivers/c0a.zip

On previous modded version Legacy setting didn't work.

Greeting. Can anyone help me with that bios - 

https://www.amd.com/en/support/desktop-k...esktop-kit

I really need “Restore on AC/Power Loss” option in the BIOS. 
I am willing to pay for the service. 
Of course if it is even possible to add and work this option.

Regards