RPC: Turn gpu{intensity,mem,engine,fan,vddc} into wrappers around set_device
RPC: Consider CPU and OpenCL devices as "PGAs" to begin migration to a simpler interface
README.RPC: Deprecate gpu{intensity,mem,engine,fan,vddc} now that they can be accessed via {pga,proc}set
RPC: Unify common code under get_pga_cgpu function
RPC: pgarestart command to match {cpu,gpu}restart
RPC: Deprecate all cpu* and gpu* commands, and remove CPU/GPU counts from 'devs' response