Add speed configuration for home-bumping movement

Marlin/example_configurations/delta/Configuration_adv.h

@@ -214,6 +214,7 @@
 #define X_HOME_RETRACT_MM 5 
 #define Y_HOME_RETRACT_MM 5 
 #define Z_HOME_RETRACT_MM 5 // deltas need the same for all three axis
+#define HOMING_BUMP_DIVISOR {10, 10, 20}  // Re-Bump Speed Divisor (Divides the Homing Feedrate)
 
 //#define QUICK_HOME  //if this is defined, if both x and y are to be homed, a diagonal move will be performed initially.