It's possible, but since we know the New 52 deaths of the Kents are a plot point in Doomsday Clock, even that might be up in the air.
It really comes down to how you want to look at it. If you want to stick to the New 52's idea that Clark sold the farm, you can certainly do that. However, if you want to believe that Superman Reborn reverted things to their older status quo, you can do that, too. Both work equally well.
One of the best things about the current "everything happened, it's all canon" approach to continuity is that readers are free to make up their own minds about little details like this and it doesn't really matter unless it becomes relevant for a new story.
Let's just stick to what's been revealed so far up until this point. If it's a plot point in Doomsday Clock, as in, it's caused by Manhattan, but it still happened and hasn't been reversed, then we're still using it.
Then once it's updated, reversed, retcon, or replaced, we'll use that new fact.
You can absolutely do that if that's the way you want to approach continuity, but you can also look at it from the perspective that, in a 8 decade old fictional construct that is ever changing and often vague, facts, whether new or old, don't really mean much. If the current ownership of the Kent farm becomes a relevant plot point in a new story, then we'll know, but, in the meantime, it can be up to the readers to decide whatever they want it to be, because that's how the current guy directing Superman's continuity is approaching it.
Like I said, if you want to stick to the last thing established prior to Superman Reborn rejiggering everything, you can do that, but you can also choose something else, too. Both are correct until that point gets brought up again. It's the Schrodinger's Cat of continuity.
The broad strokes of Secret Origin are already back as the spine, but it's been merged with elements from the New 52, along with that story's mixture of Pre-Crisis, Post-Crisis, and everything else. Johns & Frank's origin serves that role pretty well because it was designed as an amalgam of many different eras, so adding even more stuff on top of it isn't a problem.
I don't think the DCU is ever going back to exactly what the Pre-Flashpoint continuity was. Continuity is ever-shifting and ever-changing. It will certainly resemble the broader scope of DCU continuity than the more truncated and incomplete New 52 era had, but we aren't ever going back to that 100%.