arm64: dts: qcom: msm8916: Shrink mdp address length for msm8916

This shrinks the address size down to 89000 from its previous 90000
which was mistakenly pulled from downstream.

Signed-off-by: Craig Tatlor <ctatlor97@gmail.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Andy Gross <andy.gross@linaro.org>