Systems: Restore old-style LocationIndicatorActive

The commit 2eaa927 [1] altered the D-Bus associations used for setting
and getting the LED state for the Systems resource. Machines which use
entity-manager do not have the new association yet.

This commit is adding back the use of the old D-Bus method under a
compile option. This will be enabled by default until October 15, 2025
and completely removed by June 2026.

[1] https://gerrit.openbmc.org/c/openbmc/bmcweb/+/82078

Tested:
 - Built with option enabled and confirmed logging showed old method
   being used.
 - Built with option disabled and confirmed logging showed new method
   being used.

Change-Id: I271fc464ef512b742a8c85419668aa09d38e525d
Signed-off-by: Janet Adkins <janeta@us.ibm.com>
diff --git a/config/meson.build b/config/meson.build
index eb29cf6..9668f5c 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -36,6 +36,7 @@
     'redfish-provisioning-feature',
     'redfish-updateservice-use-dbus',
     'redfish-use-3-digit-messageid',
+    'redfish-use-hardcoded-system-location-indicator',
     'rest',
     'session-auth',
     'static-hosting',