meta-romulus: Update power on sequence with new obmc-power-chassis targets

Change-Id: I12da1cd3d5514ff6c9deea1cef922686cdb39dc5
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/meta-romulus/recipes-phosphor/chassis/avsbus-control/avsbus-workaround@.service b/meta-romulus/recipes-phosphor/chassis/avsbus-control/avsbus-workaround@.service
index 92d1c9f..c98e758 100644
--- a/meta-romulus/recipes-phosphor/chassis/avsbus-control/avsbus-workaround@.service
+++ b/meta-romulus/recipes-phosphor/chassis/avsbus-control/avsbus-workaround@.service
@@ -3,7 +3,7 @@
 Wants=obmc-power-start-pre@%i.target
 Before=obmc-power-start-pre@%i.target
 Before=avsbus-disable@%i.service
-Conflicts=obmc-chassis-stop@%i.target
+Conflicts=obmc-power-chassis-off@%i.target
 
 [Service]
 ExecStart={bindir}/avsbus-workaround.sh
@@ -11,4 +11,4 @@
 RemainAfterExit=yes
 
 [Install]
-WantedBy=obmc-chassis-start@%i.target
+WantedBy=obmc-power-chassis-on@%i.target