The ADA requires reasonable accommodation, not whatever the employee demands. If you’re blind they can get you a screen reader, they don’t have to hire Tim Curry to read all the text you encounter during the day. And if you lack mobility they have to have a wheelchair accessible workplace, they don’t have to let you work from from orbit via radio uplink.
Given Dell's executives comments over the past decade on the effectiveness of remote workers, it seems like it would be difficult for them to make the case that remote work is not a reasonable accomodation for a disability affecting mobility.
Yeah this is unlikely to be included. It's probably more "if your contract is office based, we won't fire you for working remote but technically you're breaking your contract right now through inertia, so we can count that as a reason to not promote you."