arm64: dts: qcom: msm8916-wingtech-wt88047: Add IMU

The Xiaomi Redmi 2 has an InvenSense MPU-6880 supported by the
inv_mpu6050 driver in Linux. Add it to the device tree.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20210712133735.318250-4-stephan@gerhold.net


Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>