meta-ibm: Added a setting for the HardwareIsolation

- In this patch, added a setting to enable or disable the
  HardwareIsolation (aka Guard) in the OpenPOWER based system.

- By default, the setting is enabled, that's means the
  HardwareIsolation feature is enabled for the IBM system so,
  the respective BMC components need to take care of the
  functionality based on the roles of each application usage
  by using this setting if needs.

Signed-off-by: Ramesh Iyyar <rameshi1@in.ibm.com>
Change-Id: If03c98b74f5bc26941ddc825cde81ea307518742
diff --git a/meta-ibm/recipes-phosphor/settings/phosphor-settings-manager/ibm_settings.override.yml b/meta-ibm/recipes-phosphor/settings/phosphor-settings-manager/ibm_settings.override.yml
index 4dc4f47..37dace6 100644
--- a/meta-ibm/recipes-phosphor/settings/phosphor-settings-manager/ibm_settings.override.yml
+++ b/meta-ibm/recipes-phosphor/settings/phosphor-settings-manager/ibm_settings.override.yml
@@ -15,3 +15,9 @@
       Properties:
           PowerMode:
               Default: Mode::PowerMode::MaximumPerformance
+
+/xyz/openbmc_project/hardware_isolation/allow_hw_isolation:
+    - Interface: xyz.openbmc_project.Object.Enable
+      Properties:
+          Enabled:
+              Default: 'true'