drm/msm/mdss: fix highest-bank-bit for msm8998

drm/msm/mdss: fix highest-bank-bit for msm8998

According to the vendor DT files, msm8998 has highest-bank-bit equal to
2. Update the data accordingly.

Fixes: 6f410b246209 ("drm/msm/mdss: populate missing data")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/555840/
Link: https://lore.kernel.org/r/20230905174353.3118648-2-dmitry.baryshkov@linaro.org
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>