MPU6050_DMP6 Example compiling issue

[jremington]

@akhilranga

(int32_t)qI[2] * qI[2] + (int32_t)qI[3] * qI[3]) / (2 * 16384);

This code was probably not intended to run on an ATmega2560, and if you try, it won't give meaningful results.