Mobile: Fix lightmap instances count

servers/rendering/renderer_rd/forward_mobile/render_forward_mobile.cpp

@@ -3320,7 +3320,7 @@ RenderForwardMobile::RenderForwardMobile() {
 
 	{
 		//lightmaps
-		scene_state.max_lightmaps = 2;
+		scene_state.max_lightmaps = MAX_LIGHTMAPS;
 		defines += "\n#define MAX_LIGHTMAP_TEXTURES " + itos(scene_state.max_lightmaps) + "\n";
 		defines += "\n#define MAX_LIGHTMAPS " + itos(scene_state.max_lightmaps) + "\n";