Revert "SPI API platform implementation stubs" (#7416)
This reverts commit 2dfa6ca72a.
Revert "Base HAL SPI Changes"
This reverts commit 2afc521b8b.
Revert "Initial HAL SPI API"
This reverts commit 58f7ffe09a.
Includes:
*firmware version / branch / date.
*extruder count
*board information (name, serial details, power supply type)
*thermistors (names, min/max temperatures)
*printer statistics (PRINTCOUNTER details)
Thanks to @thinkyhead for contributions.