ARM: dts: qcom: msm8974-hammerhead: add mount matrix for IMU

Configure the mount matrix to account for the sensor placement on the
board.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20210403105902.1867344-1-luca@z3ntu.xyz


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