A few issues with the dts support for the SSD1306 display driver:
1. binding file mixed description & generation up together
- rename most uses of generation to description and add proper
generation field into yaml
2. Drop use of BASE_LABEL, this shouldn't be used by most bindings
3. dts defines that are being assumed in driver aren't correct. We
should be using a dts_fixup.h in the sample to map the generated
defines to those used in the driver. We remove the incorrect
defines that the driver assumes right now.
4. Fixup 'segment-remap' and 'com-invdir' properties that are booleans
in the binding file and associated code changes.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>