callouts: set process metadata field

Set the process metadata field for CALLOUT_DEVICE_PATH.This means a
handler will have to be implemented for the metadata CALLOUT_DEVICE_PATH
by the logging application, but that is only if there's a need to add
CALLOUT_DEVICE_PATH to an error.

Change-Id: I5680a8517faa2ff81d79a4b00d7afca4a989b09b
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
diff --git a/xyz/openbmc_project/Common/Callout.metadata.yaml b/xyz/openbmc_project/Common/Callout.metadata.yaml
index 5236653..58565de 100644
--- a/xyz/openbmc_project/Common/Callout.metadata.yaml
+++ b/xyz/openbmc_project/Common/Callout.metadata.yaml
@@ -4,6 +4,7 @@
       type: int32
     - str: "CALLOUT_DEVICE_PATH=%s"
       type: string
+      process: true
 
 - name: GPIO
   meta: