drm/msm/dpu: Adjust CDM_MUX to support CWB PINGPONG

Similar to WB_MUX, CDM_MUX also needs to be adjusted to support
dedicated CWB PINGPONGs

Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/641272/
Link: https://lore.kernel.org/r/20250305-cdm-cwb-mux-fix-v1-1-16148ca6e4d2@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Author: Jessica Zhang

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

@@ -214,7 +214,9 @@ static void dpu_hw_cdm_bind_pingpong_blk(struct dpu_hw_cdm *ctx, const enum dpu_
 	mux_cfg = DPU_REG_READ(c, CDM_MUX);
 	mux_cfg &= ~0xf;
 
-	if (pp)
+	if (pp >= PINGPONG_CWB_0)
+		mux_cfg |= 0xd;
+	else if (pp)
 		mux_cfg |= (pp - PINGPONG_0) & 0x7;
 	else
 		mux_cfg |= 0xf;