[nav] GetPosX and GetPosY in nav.h (FW) are in local coordinates

allows to use the macro with sectors detection

fix #602
[catapult] don't use GetPos macros but state interface directly
[rotorcraft] send motor_mixing.nb_failure in ROTORCRAFT_STATUS
[imu] drotek_10dof_v2: more defaults according to PERIODIC_FREQUENCY