Is the DTS entry "base-fpga-region" still valid?



I recently purchased a DE10-Standard board and I noticed that base-fpga-region isn’t present in any examples’ soc_system.dts files. However, the fpga.dts (the DTS overlay file) appears to still reference the term “base-fpga-region”.

The soc_system.dts file of the DE1-SOC board contained an entry for the base-fpga-region.

Is base-fpga-region still valid? Why doesn’t Quartus or any of the xml board fles contain it? Do I have to manually add it to my soc_system.dts file after I run the sopc2dts command?