NIG_REG_LB_ARB_CREDIT_UPPER_BOUND_0
tc_bound_base_addr = is_lb ? NIG_REG_LB_ARB_CREDIT_UPPER_BOUND_0 : NIG_REG_TX_ARB_CREDIT_UPPER_BOUND_0;
tc_bound_addr_diff = is_lb ? NIG_REG_LB_ARB_CREDIT_UPPER_BOUND_1 - NIG_REG_LB_ARB_CREDIT_UPPER_BOUND_0 :