What are the values of these resistors (R17 and R26) in this schematic? Or are they potentiometers?
It looks like an oversight that the value was left out, since values are shown for other resistors in the schematic. If you have the full documentation, you should be able to find the value (and preferred vendor and part number) in the bill of materials (BOM) for the design.

In any case, if you don't have the BOM, the value at this location is not critical. I'd use 10k to match the other pull-ups in the design, or perhaps 47k if power is critical.