Add fan watchdog takeover target

When this target is started, the fan watchdog will
take over fan speed control and move fans to full speed.

This will be done by having other services conflict with
this target.

Change-Id: I00c00a835cc2f7087baa1649d582287628b01401
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/common/recipes-core/systemd/obmc-targets.bb b/common/recipes-core/systemd/obmc-targets.bb
index 1763879..3e217bc 100644
--- a/common/recipes-core/systemd/obmc-targets.bb
+++ b/common/recipes-core/systemd/obmc-targets.bb
@@ -66,6 +66,7 @@
         obmc-fans-ready.target \
         obmc-fan-control.target \
         obmc-fan-control-ready@.target \
+        obmc-fan-watchdog-takeover.target \
         obmc-standby.target \
         "
 
diff --git a/common/recipes-core/systemd/obmc-targets/obmc-fan-watchdog-takeover.target b/common/recipes-core/systemd/obmc-targets/obmc-fan-watchdog-takeover.target
new file mode 100644
index 0000000..8034083
--- /dev/null
+++ b/common/recipes-core/systemd/obmc-targets/obmc-fan-watchdog-takeover.target
@@ -0,0 +1,6 @@
+#The system implementation should start this target when dynamic fan control
+#is no longer desired or possible.  It should also add units to this target
+#that enabled continued operation after dynamic fan control is no longer
+#desired or possible.
+[Unit]
+Description=Fan watchdog takeover target