5045 use atomic_{inc,dec}_* instead of atomic_add_*

*** 456,466 ****
          if (instance != -1) {
                  (void) snprintf(tq_name, sizeof (tq_name),
                      "USB_%s_%x_pipehndl_tq_%d",
                      ddi_driver_name(dip), ep->bEndpointAddress, instance);
          } else {
!                 def_instance = atomic_add_32_nv(&anon_instance, 1);
  
                  (void) snprintf(tq_name, sizeof (tq_name),
                      "USB_%s_%x_pipehndl_tq_%d_",
                      ddi_driver_name(dip), ep->bEndpointAddress, def_instance);
          }
--- 456,466 ----
          if (instance != -1) {
                  (void) snprintf(tq_name, sizeof (tq_name),
                      "USB_%s_%x_pipehndl_tq_%d",
                      ddi_driver_name(dip), ep->bEndpointAddress, instance);
          } else {
!                 def_instance = atomic_inc_32_nv(&anon_instance);
  
                  (void) snprintf(tq_name, sizeof (tq_name),
                      "USB_%s_%x_pipehndl_tq_%d_",
                      ddi_driver_name(dip), ep->bEndpointAddress, def_instance);
          }