cfam-reset: run before chassis power

The IBM hardware team has requested we run the CFAM reset prior to
chassis power on. This is to help mitigate some issues seen with DIMM
failures.

Tested:
- Verified a boot completes on a rainier

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Id28d29e624bde4ce7c77c1e937c2c6e83363c6b3
diff --git a/op-cfam-reset.service.in b/op-cfam-reset.service.in
index c207887..3376c8a 100644
--- a/op-cfam-reset.service.in
+++ b/op-cfam-reset.service.in
@@ -1,7 +1,7 @@
 [Unit]
 Description=CFAM reset
-Wants=obmc-power-on@0.target
-After=obmc-power-on@0.target
+Wants=obmc-power-start-pre@0.target
+Before=obmc-power-start-pre@0.target
 Wants=obmc-host-start-pre@0.target
 Before=obmc-host-start-pre@0.target
 Before=fsi-scan@0.service