Replace the old SDLOG_DIRS_MAX=3 + larger-buffer override with the
new rotation-based tuning: SDLOG_MAX_SIZE=40 caps each log file at
40 MB so a handful of recent logs fit, and SDLOG_ROTATE=95 lets logs
fill up to 95% of the 128 MB volume.
Drop the BOARD_SMALL_FLASH_LOGGING define from board_config.h; the
logger no longer keys off a per-board compile flag.
These are generic flight controller boards (not drone-specific
products), so they should not come with a pre-selected airframe like
every other PX4 board. Drop the SYS_AUTOSTART default, matching the
convention used across the rest of the tree.
Drone-specific products (bitcraze/crazyflie, atl/mantis-edu) retain
their default airframe.
- Initialize W25N01GV NAND flash on SPI1 with littlefs.
- Enable BOARD_SMALL_FLASH_LOGGING for small flash handling.
- Increase logger buffer size for flash write performance.
This switches from attitude_estimator_q to EKF2 which should now work
without mag when the params are set to SYS_HAS_MAG = 0 and
EKF2_IMU_CTRL = 7 to enable gravity fusion.
Signed-off-by: Julian Oes <julian@oes.ch>