[Why&How]
Absense of this callback causes null pointer dereference.
Add the corresponding callback in dcn303 resources.
Fixes: 443dfba0248387 ("drm/amd/display: fix dcn3+ bw validation soc param update sequence")
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
                .panel_cntl_create = dcn303_panel_cntl_create,
                .validate_bandwidth = dcn30_validate_bandwidth,
                .calculate_wm_and_dlg = dcn30_calculate_wm_and_dlg,
+               .update_soc_for_wm_a = dcn30_update_soc_for_wm_a,
                .populate_dml_pipes = dcn30_populate_dml_pipes_from_context,
                .acquire_idle_pipe_for_layer = dcn20_acquire_idle_pipe_for_layer,
                .add_stream_to_ctx = dcn30_add_stream_to_ctx,