scripts/release-notes: Ignore witherspoon_dev for XML

The XML for witherspoon_dev is the same as for the normal witherspoon
platform so ignore it when cloning platform-xml repositories.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
diff --git a/openpower/scripts/release-notes b/openpower/scripts/release-notes
index 74e57db..6cc966e 100755
--- a/openpower/scripts/release-notes
+++ b/openpower/scripts/release-notes
@@ -149,6 +149,7 @@
 	    $p = "witherspoon";
 	    $witherspoon_insanity = 1;
     }
+    next if ($p =~ /witherspoon_dev/);
     $repos->{"$p-xml"} = { REPO => "https://github.com/open-power/$p-xml" ,
 			   DIR => "openpower/package/$p-xml" };
 }