drm/amd/display: Reuse subvp enable check for DCN401

Reuse subvp enable check from DCN32 for IGT testing of Sub-Viewport
feature on DCN401

Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/resource/dcn401/dcn401_resource.c

@@ -1579,7 +1579,8 @@ static void dcn401_destroy_resource_pool(struct resource_pool **pool)
 }
 
 static struct dc_cap_funcs cap_funcs = {
-	.get_dcc_compression_cap = dcn20_get_dcc_compression_cap
+	.get_dcc_compression_cap = dcn20_get_dcc_compression_cap,
+	.get_subvp_en = dcn32_subvp_in_use,
 };
 
 static void dcn401_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params)