Typedef req_t

typedef struct packed {                                                                  
    aw_chan_t aw;                                                                     
    logic          aw_valid;                                                               
    w_chan_t  w;                                                                      
    logic          w_valid;                                                                
    logic          b_ready;                                                                
    ar_chan_t ar;                                                                     
    logic          ar_valid;                                                               
    logic          r_ready;                                                                
  } req_t;