Add new debug message level for excessive information

Some frequent debug prints are of limited use and make debug output
difficult to read. Make them use a new debug level so that -dd
provides more readable output (-ddd can now be used to enable
the excessive debug prints).

src/utils/wpa_debug.h

@@ -20,7 +20,9 @@
 /* Debugging function - conditional printf and hex dump. Driver wrappers can
  * use these for debugging purposes. */
 
-enum { MSG_MSGDUMP, MSG_DEBUG, MSG_INFO, MSG_WARNING, MSG_ERROR };
+enum {
+	MSG_EXCESSIVE, MSG_MSGDUMP, MSG_DEBUG, MSG_INFO, MSG_WARNING, MSG_ERROR
+};
 
 #ifdef CONFIG_NO_STDOUT_DEBUG