Move MBX reset into new obmc-power-chassis targets

Change-Id: I2ad5a9a9613b4d390496d0bd6c88e9b4aaacfdef
Signed-off-by: Andrew Geissler <andrewg@us.ibm.com>
diff --git a/meta-phosphor/common/recipes-phosphor/mboxd/mboxd.bb b/meta-phosphor/common/recipes-phosphor/mboxd/mboxd.bb
index e511396..a9785b8 100644
--- a/meta-phosphor/common/recipes-phosphor/mboxd/mboxd.bb
+++ b/meta-phosphor/common/recipes-phosphor/mboxd/mboxd.bb
@@ -33,7 +33,7 @@
 }
 
 TMPL = "mboxd-reload@.service"
-TGTFMT = "obmc-chassis-stop@{0}.target"
+TGTFMT = "obmc-power-chassis-off@{0}.target"
 INSTFMT = "mboxd-reload@{0}.service"
 FMT = "../${TMPL}:${TGTFMT}.wants/${INSTFMT}"