drm/msm/disp/dpu1/dpu_hw_sspp: Fix kernel-doc formatting abuse

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c:240: warning: Function parameter or member 'ctx' not described in 'dpu_hw_sspp_setup_format'
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c:240: warning: Function parameter or member 'fmt' not described in 'dpu_hw_sspp_setup_format'
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c:240: warning: Function parameter or member 'flags' not described in 'dpu_hw_sspp_setup_format'
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c:240: warning: Function parameter or member 'rect_mode' not described in 'dpu_hw_sspp_setup_format'
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c:446: warning: Function parameter or member 'ctx' not described in 'dpu_hw_sspp_setup_rects'
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c:446: warning: Function parameter or member 'cfg' not described in 'dpu_hw_sspp_setup_rects'
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c:446: warning: Function parameter or member 'rect_index' not described in 'dpu_hw_sspp_setup_rects'

Cc: Rob Clark <robdclark@gmail.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Jonathan Marek <jonathan@marek.ca>
Cc: linux-arm-msm@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: freedreno@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

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

@@ -231,7 +231,7 @@ static void _sspp_setup_csc10_opmode(struct dpu_hw_pipe *ctx,
 	DPU_REG_WRITE(&ctx->hw, SSPP_VIG_CSC_10_OP_MODE + idx, opmode);
 }
 
-/**
+/*
  * Setup source pixel format, flip,
  */
 static void dpu_hw_sspp_setup_format(struct dpu_hw_pipe *ctx,
@@ -437,7 +437,7 @@ static u32 _dpu_hw_sspp_get_scaler3_ver(struct dpu_hw_pipe *ctx)
 	return dpu_hw_get_scaler3_ver(&ctx->hw, idx);
 }
 
-/**
+/*
  * dpu_hw_sspp_setup_rects()
  */
 static void dpu_hw_sspp_setup_rects(struct dpu_hw_pipe *ctx,