drm/amd/display: Adjust kdoc for 'optc35_set_odm_combine'

Fixes the following W=1 kernel build warning:

drivers/gpu/drm/amd/amdgpu/../display/dc/dcn35/dcn35_optc.c:46: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Enable CRTC

Cc: Qingqing Zhuo <Qingqing.Zhuo@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn35/dcn35_optc.c

@@ -43,10 +43,15 @@
 	optc1->tg_shift->field_name, optc1->tg_mask->field_name
 
 /**
- * Enable CRTC
- * Enable CRTC - call ASIC Control Object to enable Timing generator.
+ * optc35_set_odm_combine() - Enable CRTC - call ASIC Control Object to enable Timing generator.
+ *
+ * @optc: Output Pipe Timing Combine instance reference.
+ * @opp_id: Output Plane Processor instance ID.
+ * @opp_cnt: Output Plane Processor count.
+ * @timing: Timing parameters used to configure DCN blocks.
+ *
+ * Return: void.
  */
-
 static void optc35_set_odm_combine(struct timing_generator *optc, int *opp_id, int opp_cnt,
 		struct dc_crtc_timing *timing)
 {