Consolidate "bedlevel" code

Marlin/src/module/planner.h

@@ -34,6 +34,12 @@
 
 #include "../Marlin.h"
 
+#include "motion.h"
+
+#if ENABLED(DELTA)
+  #include "delta.h"
+#endif
+
 #if HAS_ABL
   #include "../libs/vector_3.h"
 #endif
@@ -159,7 +165,7 @@ class Planner {
                  max_jerk[XYZE],       // The largest speed change requiring no acceleration
                  min_travel_feedrate_mm_s;
 
-    #if HAS_ABL
+    #if OLDSCHOOL_ABL
       static bool abl_enabled;              // Flag that bed leveling is enabled
       #if ABL_PLANAR
         static matrix_3x3 bed_level_matrix; // Transform to compensate for bed level