drm/msm/dpu: dpu_hw_cdm.h: fix all kernel-doc warnings

Correct and add kernel-doc comments to eliminate all warnings:

Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cdm.h:91 Incorrect use of
 kernel-doc format:          * Enable the CDM module
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cdm.h:97 Incorrect use of
 kernel-doc format:          * Enable/disable the connection with pingpong

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695651/
Link: https://lore.kernel.org/r/20251219184638.1813181-4-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

Author: rddunlap

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

@@ -89,13 +89,13 @@ enum dpu_hw_cdwn_op_mode_method_h_v {
  */
 struct dpu_hw_cdm_ops {
 	/**
-	 * Enable the CDM module
+	 * @enable: Enable the CDM module
 	 * @cdm         Pointer to chroma down context
 	 */
 	int (*enable)(struct dpu_hw_cdm *cdm, struct dpu_hw_cdm_cfg *cfg);
 
 	/**
-	 * Enable/disable the connection with pingpong
+	 * @bind_pingpong_blk: Enable/disable the connection with pingpong
 	 * @cdm         Pointer to chroma down context
 	 * @pp          pingpong block id.
 	 */