fix various coding style issues for drivers/sensors:
- remove redundant `#define CONFIG_XXX` that should be provided from Kconfig
- correct section banners
- remove empty section banners
- fix some function banners
Signed-off-by: raiden00pl <raiden00@railab.me>
Add support for BME688 sensor based on BME680 implementation.
The BME688 is nearly identical to the BME680, and this implementation
reuses much of the existing BME680 code. However, there are some differences
related to gas measurements that make it impractical to use the same driver
without significantly complicating it. BME688 also supports parallel mode
which isn't yet supported.
Signed-off-by: raiden00pl <raiden00@railab.me>
