mm: set CONFIG_ZONE_DEVICE=y on most 64-bit architectures, not only amd64
FS_DAX depends on ZONE_DEVICE, but ZONE_DEVICE is currently enabled only on amd64. Enable ZONE_DEVICE on most 64-bit architectures.
Fixes: aea9926d ("vfs,nvdimm: Really enable FS_DAX")
Edited by Emanuele Rocca