Improve debug of homing move feedrate

Marlin/src/module/motion.cpp

       SERIAL_ECHOPAIR(">>> do_homing_move(", axis_codes[axis]);
       SERIAL_ECHOPAIR(", ", distance);
       SERIAL_ECHOPAIR(", ", fr_mm_s);
-      SERIAL_CHAR(')');
-      SERIAL_EOL();
+      SERIAL_ECHOPAIR(" [", fr_mm_s ? fr_mm_s : homing_feedrate(axis));
+      SERIAL_ECHOLNPGM("])");
     }
   #endif