ares_getnameinfo: Partially revert commit 85520d66e0

Upon socket address family and length validation failure return ARES_ENOTIMP
in callback again, this is the error code documented in man page and used
mostly all over the library.

ares_getnameinfo.c

@@ -114,7 +114,7 @@ void ares_getnameinfo(ares_channel channel, const struct sockaddr *sa,
     }
   else
     {
-      callback(arg, ARES_EBADFAMILY, 0, NULL, NULL);
+      callback(arg, ARES_ENOTIMP, 0, NULL, NULL);
       return;
     }