UBL able to generate mesh and save and load it on 32-bit platforms (#8015)

* Get UBL Mesh Generation, Mesh Save & Mesh Load working with 32-Bit platforms

* clean up read_data() and write_data() for non-LPC1768 HAL's

* Get read_data() and write_data() return codes consistent

All HAL's read_data() and write_data() return false if they succeed.

* Get read_data() and write_data() return codes to be consistent

Make read_data() and write_data() return true if an error happens.

* Say UBL is now checked out on machine types in default Configuration.h file.

Marlin/src/config/examples/Mks/Sbase/Configuration.h

@@ -856,12 +856,7 @@
  * - AUTO_BED_LEVELING_UBL (Unified Bed Leveling)
  *   A comprehensive bed leveling system combining the features and benefits
  *   of other systems. UBL also includes integrated Mesh Generation, Mesh
- *   Validation and Mesh Editing systems. Currently, UBL is only checked out
- *   for Cartesian Printers. That said, it was primarily designed to correct
- *   poor quality Delta Printers. If you feel adventurous and have a Delta,
- *   please post an issue if something doesn't work correctly. Initially,
- *   you will need to set a reduced bed size so you have a rectangular area
- *   to test on.
+ *   Validation and Mesh Editing systems. 
  *
  * - MESH_BED_LEVELING
  *   Probe a grid manually