teflon: Add support for Subtract

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34629>

src/gallium/frontends/teflon/tfl_device.c

@@ -234,6 +234,9 @@ fill_operation(struct teflon_delegate *delegate, TfLiteContext *tf_context, TfLi
    case kTfLiteBuiltinLogistic:
       operation->type = PIPE_ML_OPERATION_TYPE_LOGISTIC;
       break;
+   case kTfLiteBuiltinSub:
+      operation->type = PIPE_ML_OPERATION_TYPE_SUBTRACT;
+      break;
    default:
       return false;
    }
@@ -376,6 +379,9 @@ dump_graph(struct pipe_tensor *tensors, unsigned tensor_count, struct pipe_ml_op
       case PIPE_ML_OPERATION_TYPE_LOGISTIC:
          teflon_debug("%-6s ", "LOG");
          break;
+      case PIPE_ML_OPERATION_TYPE_SUBTRACT:
+         teflon_debug("%-6s ", "SUB");
+         break;
       }
 
       for (unsigned j = 0; j < operations[i].input_count; j++) {

src/gallium/include/pipe/p_state.h

@@ -1052,6 +1052,7 @@ enum pipe_ml_operation_type {
    PIPE_ML_OPERATION_TYPE_RELU,
    PIPE_ML_OPERATION_TYPE_ABSOLUTE,
    PIPE_ML_OPERATION_TYPE_LOGISTIC,
+   PIPE_ML_OPERATION_TYPE_SUBTRACT,
 };
 
 /**