Dexter Industries IMU Gyro control register 4 constants

DIGYRO_CTRL4_BIGENDIAN DIGYRO_CTRL4_BLOCKDATA DIGYRO_CTRL4_SCALE_2000 DIGYRO_CTRL4_SCALE_250 DIGYRO_CTRL4_SCALE_500

#define DIGYRO_CTRL4_SCALE_500   0x10 Gyro 500 degrees per second scale