This adds the ICM42686p as a possible alternative to the existing IMUs.
Apparently, the ICM20689 was never actually used in these boards.
Signed-off-by: Julian Oes <julian@oes.ch>
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>