ethernet_interface: Fix link local autoconfiguration functionality

When this option "default-link-local-autoconf" be enabled by default,
that will enable link local autoconfiguration feature. However, seems
the logical is mismatch in EthernetInterface::originIsManuallyAssigned.
Fix the logical to match code with option for correct functionality.

Change-Id: I5a4493d1230caef60031e7b366bc41da7b5e82f4
Signed-off-by: Tim Lee <timlee660101@gmail.com>
diff --git a/src/ethernet_interface.cpp b/src/ethernet_interface.cpp
index a577c2a..c01e1c7 100644
--- a/src/ethernet_interface.cpp
+++ b/src/ethernet_interface.cpp
@@ -162,10 +162,10 @@
 {
     return (
 #ifdef LINK_LOCAL_AUTOCONFIGURATION
-        (origin == IP::AddressOrigin::Static)
-#else
         (origin == IP::AddressOrigin::Static ||
          origin == IP::AddressOrigin::LinkLocal)
+#else
+        (origin == IP::AddressOrigin::Static)
 #endif
 
     );