warm reboot: stop instructions support

When shutting down the host it is good to always stop instructions on
the processors to ensure all activity has halted prior to starting a
shutdown or reboot.

Eventually this service will migrate over to using an ecmd API but until
that is ready, just use pdbg

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I1b81aa16c37124d7671eb84bbbc22cddd0a05e3f
diff --git a/Makefile.am b/Makefile.am
index 8f72036..70a2552 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -2,7 +2,8 @@
 
 systemdsystemunit_DATA = \
   pcie-poweroff@.service \
-  xyz.openbmc_project.Control.Host.NMI.service
+  xyz.openbmc_project.Control.Host.NMI.service \
+  op-stop-instructions@.service
 
 if ENABLE_PHAL
   systemdsystemunit_DATA += set-spi-mux.service