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

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

Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.h:30 Cannot find
 identifier on line: *
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_cwb.h:61 expecting prototype
 for dpu_hw_cwb(). Prototype was for to_dpu_hw_cwb() instead

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695664/
Link: https://lore.kernel.org/r/20251219184638.1813181-6-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

Author: rddunlap

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

@@ -28,7 +28,6 @@ struct dpu_hw_cwb_setup_cfg {
 };
 
 /**
- *
  * struct dpu_hw_cwb_ops : Interface to the cwb hw driver functions
  * @config_cwb: configure CWB mux
  */
@@ -54,7 +53,7 @@ struct dpu_hw_cwb {
 };
 
 /**
- * dpu_hw_cwb - convert base object dpu_hw_base to container
+ * to_dpu_hw_cwb - convert base object dpu_hw_base to container
  * @hw: Pointer to base hardware block
  * return: Pointer to hardware block container
  */