update service file deps in accordance with recent refactoring

As noted in the following mailing list thread:
https://lists.ozlabs.org/pipermail/openbmc/2022-November/032457.html

and implemented via this series of commits:
https://gerrit.openbmc.org/q/topic:op-power-control-ref

Some systemd services had their names changed. Update the service files
in this repo to reflect this.

Change-Id: I2121c63ba18222bbd1dfb37a2484d789950a160a
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/services/pseq-monitor-pgood.service b/services/pseq-monitor-pgood.service
index ee2ec92..8745197 100644
--- a/services/pseq-monitor-pgood.service
+++ b/services/pseq-monitor-pgood.service
@@ -1,7 +1,7 @@
 [Unit]
 Description=Power Sequencer Power-on Monitor
-Wants=op-power-start@0.service
-After=op-power-start@0.service
+Wants=obmc-power-start@0.service
+After=obmc-power-start@0.service
 Conflicts=obmc-power-stop-pre@0.target
 After=obmc-power-stop-pre@0.target
 ConditionPathExists=!/run/openbmc/chassis@0-on