Don't throw exception in the case of deletion of link local address

We have the issue opened for where link local address should not
implement the delete interface at all, we need some refactoring there
so for quick fix if delete operation performed on link local address
we are just logging it in the journal and return.

Resolves openbmc/openbmc#2561

Change-Id: I031e92206b98b729ea0bc0b135fb406563fc5dd0
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
diff --git a/ipaddress.cpp b/ipaddress.cpp
index 4daccd5..9244b24 100644
--- a/ipaddress.cpp
+++ b/ipaddress.cpp
@@ -42,7 +42,7 @@
     {
         log<level::ERR>("DHCP enabled on the interface"),
             entry("INTERFACE=%s", parent.interfaceName().c_str());
-        elog<InternalFailure>();
+        return;
     }
 
     if (isLinkLocalIP(address()))
@@ -50,7 +50,7 @@
         log<level::ERR>("Can not delete the LinkLocal address"),
             entry("INTERFACE=%s ADDRESS=%s",
                   parent.interfaceName().c_str(), address().c_str());
-        elog<InternalFailure>();
+        return;
     }
 
     parent.deleteObject(address());