PEL: Allow the caller to set the severity for PHAL.Boot.Error

During poweroff we want to log informational error for any
boot related errors.

Refer
https://gerrit.openbmc.org/c/openbmc/openpower-proc-control/+/53911

Signed-off-by: Marri Devender Rao <devenrao@in.ibm.com>
Change-Id: I7decffb7aa550b782a87a84f7744fb6e40efa06a
diff --git a/extensions/openpower-pels/registry/message_registry.json b/extensions/openpower-pels/registry/message_registry.json
index cb4ce13..eb8bdc3 100644
--- a/extensions/openpower-pels/registry/message_registry.json
+++ b/extensions/openpower-pels/registry/message_registry.json
@@ -464,7 +464,6 @@
             "Name": "org.open_power.PHAL.Error.Boot",
             "Subsystem": "cec_hardware",
             "ComponentID": "0x3000",
-            "Severity": "unrecoverable",
 
             "SRC":
             {