drm/msm/dpu: drop DPU_DIM_LAYER from MIXER_MSM8998_MASK

The msm8998 doesn't seem to support DIM_LAYER, so drop it from
the supported features mask.

Fixes: 2d8a4ed ("drm/msm/dpu: use feature bit for LM combined alpha check")
Fixes: 94391a1 ("drm/msm/dpu1: Add MSM8998 to hw catalog")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/522231/
Link: https://lore.kernel.org/r/20230211231259.1308718-12-dmitry.baryshkov@linaro.org
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>

Author: lumag

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c

@@ -52,7 +52,7 @@
 	(DMA_MSM8998_MASK | BIT(DPU_SSPP_CURSOR))
 
 #define MIXER_MSM8998_MASK \
-	(BIT(DPU_MIXER_SOURCESPLIT) | BIT(DPU_DIM_LAYER))
+	(BIT(DPU_MIXER_SOURCESPLIT))
 
 #define MIXER_SDM845_MASK \
 	(BIT(DPU_MIXER_SOURCESPLIT) | BIT(DPU_DIM_LAYER) | BIT(DPU_MIXER_COMBINED_ALPHA))