drm/amd/display: Clear link res when merging a pipe split

[Description]
- When merging a pipe that was previously pipe split, we need
  to also clear the link resources or the next stream/plane that
  uses the pipe may have an incorrect link resource state
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Nevenko Stupar <Nevenko.Stupar@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c

@@ -1647,6 +1647,7 @@ bool dcn32_internal_validate_bw(struct dc *dc,
 				dcn20_release_dsc(&context->res_ctx, dc->res_pool, &pipe->stream_res.dsc);
 			memset(&pipe->plane_res, 0, sizeof(pipe->plane_res));
 			memset(&pipe->stream_res, 0, sizeof(pipe->stream_res));
+			memset(&pipe->link_res, 0, sizeof(pipe->link_res));
 			repopulate_pipes = true;
 		} else if (pipe->top_pipe && pipe->top_pipe->plane_state == pipe->plane_state) {
 			struct pipe_ctx *top_pipe = pipe->top_pipe;
@@ -1662,6 +1663,7 @@ bool dcn32_internal_validate_bw(struct dc *dc,
 			pipe->stream = NULL;
 			memset(&pipe->plane_res, 0, sizeof(pipe->plane_res));
 			memset(&pipe->stream_res, 0, sizeof(pipe->stream_res));
+			memset(&pipe->link_res, 0, sizeof(pipe->link_res));
 			repopulate_pipes = true;
 		} else
 			ASSERT(0); /* Should never try to merge master pipe */