each. relocated acc_t/gyro_t from sensors_common.h into
drivers/accgyro_common.h since they define an interface and the
dependency was pointing the wrong way from the drivers.
baro_t/acc_t/gyro_t dependences are all now pointing the right way.
of determining a revision code. Previously there was mpu6050 specific
code in cli.c (the status command).
Finally this commit has removed all non-serial port configuration
settings from core_t so that a future commit can refactor core_t to
reduce dependencies on serial port code.
In doing this I also noted from other source code that the MPU6050
accelerometer trim for some revisions appeared to be incorrectly set to
255 * 8 instead of 256 * 8.
