dt-bindings: input: Revert "dt-bindings: input: Goodix SPI HID Touchscreen"

This reverts commit 9184b17 ("dt-bindings: input: Goodix SPI HID
Touchscreen") because it duplicates existing binding leadings to errors:

  goodix,gt7986u.example.dtb:
  touchscreen@0: compatible: 'oneOf' conditional failed, one must be fixed:
        ['goodix,gt7986u'] is too short
        'goodix,gt7375p' was expected

This was reported on mailing list on 6th of September, but no reaction
happened from contributor or maintainer to fix it.

Therefore let's drop binding which breaks and duplicates existing one.

Fixes: 9184b17 ("dt-bindings: input: Goodix SPI HID Touchscreen")
Reported-by: Rob Herring <[email protected]>
Closes: https://lore.kernel.org/all/CAL_Jsq+QfTtRj_JCqXzktQ49H8VUnztVuaBjvvkg3fwEHniUHw@mail.gmail.com/
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

Author: krzk