control: command line tool to retrieve fan status (status/help functions)

This is part one of a multipart commit to create a fan control
command line utility to report service status, show target/
actual RPM/PWM info, and manually control single fans.
Currently this only implements "status" and "help" commands
(and makefile). Further functionality will come in subsequent
commits.

Signed-off-by: Mike Capps <mikepcapps@gmail.com>
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
Change-Id: I9a9fc5c50edf7981075b59bb526e967e50e67c86
2 files changed