rainier: Add fan watchdog BMC protection

Configure and include the fan watchdog services to drive the fans to
100% PWM if the BMC loses communication to the fan controller chip at
any time (i.e. BMC reset while powered on).

(From meta-ibm rev: 1264216bc2f10cf08f697bc1c95f10237c95515a)

Change-Id: I18865bdc06c1a2be0c2a83d5e83402b9316ee845
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>