XXXX introduce drv_sectohz

@@ -851,11 +851,11 @@
          * sent before this thread being created
          */
         for (;;) {
 
                 /* Compute the delay interval */
-                interval = drv_usectohz(irm_balance_delay * 1000000);
+                interval = drv_sectohz(irm_balance_delay);
 
                 /* Wait one interval, or until there are waiters */
                 if ((interval > 0) &&
                     !(pool_p->ipool_flags & DDI_IRM_FLAG_WAITERS) &&
                     !(pool_p->ipool_flags & DDI_IRM_FLAG_EXIT)) {