drm/msm/dpu: dpu_hw_dspp.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_dspp.h:33 expecting prototype
 for struct dpu_hw_pcc. Prototype was for struct dpu_hw_pcc_cfg instead
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h:42 Incorrect use of
 kernel-doc format: * setup_pcc - setup dspp pcc
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h:48 struct member
 'setup_pcc' not described in 'dpu_hw_dspp_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_dspp.h:76 expecting prototype
 for dpu_hw_dspp(). Prototype was for to_dpu_hw_dspp() instead

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695652/
Link: https://lore.kernel.org/r/20251219184638.1813181-8-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

Author: rddunlap

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

@@ -22,7 +22,7 @@ struct dpu_hw_pcc_coeff {
 };
 
 /**
- * struct dpu_hw_pcc - pcc feature structure
+ * struct dpu_hw_pcc_cfg - pcc feature structure
  * @r: red coefficients.
  * @g: green coefficients.
  * @b: blue coefficients.
@@ -40,7 +40,7 @@ struct dpu_hw_pcc_cfg {
  */
 struct dpu_hw_dspp_ops {
 	/**
-	 * setup_pcc - setup dspp pcc
+	 * @setup_pcc: setup_pcc - setup dspp pcc
 	 * @ctx: Pointer to dspp context
 	 * @cfg: Pointer to configuration
 	 */
@@ -69,7 +69,7 @@ struct dpu_hw_dspp {
 };
 
 /**
- * dpu_hw_dspp - convert base object dpu_hw_base to container
+ * to_dpu_hw_dspp - convert base object dpu_hw_base to container
  * @hw: Pointer to base hardware block
  * return: Pointer to hardware block container
  */