drm/msm/mdss: correct UBWC programming for SM8550

The SM8550 platform employs newer UBWC decoder, which requires slightly
different programming.

Fixes: a2f33995 ("drm/msm: mdss: add support for SM8550")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/546934/
Link: https://lore.kernel.org/r/20230712121145.1994830-3-dmitry.baryshkov@linaro.org


Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>