Add FSI enable/disable services for cronus use

Start fsi-disable.service to unbind the FSI Driver.
Start fsi-enable.service to bind it again and rescan.

Also added a fsi-bind@.service so we can ensure the
driver is bound each power on.

Change-Id: I5fa62b44994aea3bb645e755187f29e720bf3bce
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/common/recipes-phosphor/chassis/obmc-fsi/fsi-disable.service b/common/recipes-phosphor/chassis/obmc-fsi/fsi-disable.service
new file mode 100644
index 0000000..a58af04
--- /dev/null
+++ b/common/recipes-phosphor/chassis/obmc-fsi/fsi-disable.service
@@ -0,0 +1,8 @@
+[Unit]
+Description=Disable FSI
+Conflicts=fsi-enable.service
+
+[Service]
+ExecStart=/bin/sh -c "echo fsi-master > /sys/bus/platform/drivers/fsi-master-gpio/unbind"
+Type=oneshot
+RemainAfterExit=yes