Fix get_period_inverse(0) so it doesn't crash (#11334)

Marlin/src/module/planner.cpp

     // All other 32-bit MPUs can easily do inverse using hardware division,
     // so we don't need to reduce precision or to use assembly language at all.
     // This routine, for all other archs, returns 0x100000000 / d ~= 0xFFFFFFFF / d
-    static FORCE_INLINE uint32_t get_period_inverse(const uint32_t d) { return 0xFFFFFFFF / d; }
+    static FORCE_INLINE uint32_t get_period_inverse(const uint32_t d) {
+      return d ? 0xFFFFFFFF / d : 0xFFFFFFFF;
+    }
   #endif
 #endif