This is an initial cut for feedback, updated for 2.0.x.

Chamber temperature is currently reported along with hot end and bed
temperatures to serial. The format is just like that used for hot end
and bed temperatures, but using 'C' prefix. As there is no heater,
target is always 0. Is this appropriate, is there a better way to report
chamber temperatures?

Chamber temperatures are not reported on the LCD in any way.

When auto chamber fan is enabled, it currently just uses the same
temperature threshold as the other auto controlled fans.

As the chamber temperature is not connected to any heater, it doesn't
undergo mintemp/maxtemp monitoring. This would need to change in the
future if chamber heating became a feature.

http://reprap.org/wiki/EinsyRetro

- Assign 243 (like EFB) as Ender-4/CR-8 board ID
- Add to `Makefile`
- Add to `pins.h`

Followup to 436e5b7

Based on #10131

@Bob-the-Kuhn — Please set your git options to remove trailing whitespace on commit.

Fixes #9211

Reference #9983

added device & comm drivers for shared SPI LCDs

mistyped some updates in ultralcd_impl_DOGM.h

remove unwanted changes in onfiguration.h

still can't type

Update HAL_LCD_class_defines.h

include USB mass storage & misc

Followup to #9008

- Don't define micro-stepping pins for boards that lack them.
- Allow setting of 128 microsteps with `M350`.

Fix display of analog input value.

Fix #9778

needed for UBL

* VIKI2 & RE_ARM changes

1. Remove `DISABLED(SDSUPPORT)` from ST7565 in `ultralcd_impl_DOGM.h`. These LCDs share pins with the SD card and can run at the SD card rates.

2. Add SDSS definition to `pins_RAMPS_RE_ARM.h`.  Apparently the SDSS definition in `pins.h` is being processed before the one in `spi_pins.h` which resulted in not being able to read the SD card.

Addressing #9474

Fixes #8794