XXXX introduce drv_sectohz

*** 154,164 ****
  #define SGEN_ESTIMATED_NUM_DEVS 4               /* for soft-state allocation */
  
  /*
   * Time to wait before a retry for commands returning Busy Status
   */
! #define SGEN_BSY_TIMEOUT        (drv_usectohz(5 * 1000000))
  #define SGEN_IO_TIME            60              /* seconds */
  
  /*
   * sgen_callback action codes
   */
--- 154,164 ----
  #define SGEN_ESTIMATED_NUM_DEVS 4               /* for soft-state allocation */
  
  /*
   * Time to wait before a retry for commands returning Busy Status
   */
! #define SGEN_BSY_TIMEOUT        drv_sectohz(5)
  #define SGEN_IO_TIME            60              /* seconds */
  
  /*
   * sgen_callback action codes
   */