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

drm/msm/dpu: dpu_hw_lm.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_lm.h:27 Cannot find
 identifier on line: *
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:52 Incorrect use of
 kernel-doc format: * Clear layer mixer to pipe configuration
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:59 Incorrect use of
 kernel-doc format: * Configure layer mixer to pipe configuration
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:69 Incorrect use of
 kernel-doc format: * setup_border_color : enable/disable border color
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:76 Incorrect use of
 kernel-doc format: * setup_misr: Enable/disable MISR
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:81 Incorrect use of
 kernel-doc format: * collect_misr: Read MISR signature

Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
 'setup_mixer_out' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
 'setup_blend_config' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
 'setup_alpha_out' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
 'clear_all_blendstages' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
 'setup_blendstage' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
 'setup_border_color' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
 'setup_misr' not described in 'dpu_hw_lm_ops'
Warning: drivers/gpu/drm/msm/disp/dpu1/dpu_hw_lm.h:84 struct member
 'collect_misr' not described in 'dpu_hw_lm_ops'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/695648/
Link: https://lore.kernel.org/r/20251219184638.1813181-10-rdunlap@infradead.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>