drm/amd/display: Fix up missing 'dc' & 'pipe_ctx' kdoc parameters in delay_cursor_until_vupdate()

Fixes the following gcc with W=1:

drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hw_sequencer.c:1904: warning: Function parameter or member 'dc' not described in 'delay_cursor_until_vupdate'
drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hw_sequencer.c:1904: warning: Function parameter or member 'pipe_ctx' not described in 'delay_cursor_until_vupdate'

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

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -1899,6 +1899,11 @@ void dcn10_pipe_control_lock(
  *
  * TODO: Optimize cursor programming to be once per frame before VUPDATE
  *       to avoid the need for this workaround.
+ *
+ * @dc: Current DC state
+ * @pipe_ctx: Pipe_ctx pointer for delayed cursor update
+ *
+ * Return: void
  */
 static void delay_cursor_until_vupdate(struct dc *dc, struct pipe_ctx *pipe_ctx)
 {