Use dma_cachectl() with the right size rather than DCIAS() which implies a cache line. tested deraadt@
Use dma_cachectl() with the right size rather than DCIAS() which implies a
cache line.
tested deraadt@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars