[PATCH v6 25/26] Revert "riscv: mm: Add support for ZONE_DEVICE"

[Dan Williams]

Alistair Popple wrote:
> DEVMAP PTEs are no longer required to support ZONE_DEVICE so remove
> them.
> 
> Signed-off-by: Alistair Popple <apopple at nvidia.com>
> Suggested-by: Chunyan Zhang <zhang.lyra at gmail.com>
> Reviewed-by: Björn Töpel <bjorn at rivosinc.com>

This and the next are candidates to squash into the previous remove
patch, right? ...and I am not sure a standalone "Revert" commit is
appropriate when other archs get an omnibus "Remove" cleanup with a
longer explanation in the changelog.

Patch looks good though and you can preserve my Reviewed-by on the
squash.