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/phosphor-regulators-config.service b/services/phosphor-regulators-config.service
index 8ef5763..742fcad 100644
--- a/services/phosphor-regulators-config.service
+++ b/services/phosphor-regulators-config.service
@@ -4,7 +4,7 @@
 After=phosphor-regulators.service
 Wants=obmc-power-start-pre@0.target
 Before=obmc-power-start-pre@0.target
-Before=op-power-start@0.service
+Before=obmc-power-start@0.service
 Conflicts=obmc-chassis-poweroff@0.target
 # Should not run again if BMC reboots while host is running
 ConditionPathExists=!/run/openbmc/chassis@0-on