drm/amd/display: Allow cursor position when plane_res.ipp is NULL

[Why]
Starting with DCN1, the input_pixel_processor (ipp) struct has been
replaced by dpp struct (part of DAL3.1 SW architecture change).
Need to update logic to handle cases where ipp is never allocated.

[How]
Only skip cursor position programming if both ipp and dpp resources
are NULL.
Signed-off-by: Eric Bernstein <eric.bernstein@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_stream.c

@@ -333,7 +333,7 @@ bool dc_stream_set_cursor_position(
 				(!pipe_ctx->plane_res.mi  && !pipe_ctx->plane_res.hubp) ||
 				!pipe_ctx->plane_state ||
 				(!pipe_ctx->plane_res.xfm && !pipe_ctx->plane_res.dpp) ||
-				!pipe_ctx->plane_res.ipp)
+				(!pipe_ctx->plane_res.ipp && !pipe_ctx->plane_res.dpp))
 			continue;
 
 		if (!pipe_to_program) {