add an assertion to check the maximum number of layers

Author: amin1377

vpr/src/base/vpr_api.cpp

@@ -452,6 +452,8 @@ void vpr_create_device_grid(const t_vpr_setup& vpr_setup, const t_arch& Arch) {
     float target_device_utilization = vpr_setup.PackerOpts.target_device_utilization;
     device_ctx.grid = create_device_grid(vpr_setup.device_layout, Arch.grid_layouts, num_type_instances, target_device_utilization);
 
+    VTR_ASSERT_MSG(device_ctx.grid.get_num_layers() < MAX_NUM_LAYERS, "Number of layers should be less than MAX_NUM_LAYERS. If you need more layers, please increase the value of MAX_NUM_LAYERS in vpr_types.h");
+
     /*
      *Report on the device
      */