Asymmetric Multiprocessing (AMP) support.

There is an increasing number of multi-processor systems. Most of these under-utilize the secondary processor, as many modern tasks are I/O-limited. Furthermore, it seems likely that the first version of SMP support for OpenBSD will be very coarse-grained: only one processor (and process) can be inside the kernel at a time. An alternative approach is to designate the secondary processor as a dedicated cryptographic accelerator that registers with the OCF as such. No special support by the OCF is necessary, and we are currently working toward an implementation of this.