drm/msm: drop MAX_BRIDGES define

The const MAX_BRIDGES is unused after the commit 4d1a1e4 ("drm/msm:
remove msm_drm_private::bridges field"), drop it now.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/622537/
Link: https://lore.kernel.org/r/20241031-dpu-move-topology-v1-3-8ffa8122d3b6@linaro.org

drivers/gpu/drm/msm/msm_drv.h

@@ -52,7 +52,6 @@ struct msm_gem_vma;
 struct msm_disp_state;
 
 #define MAX_CRTCS      8
-#define MAX_BRIDGES    8
 
 #define FRAC_16_16(mult, div)    (((mult) << 16) / (div))