4851 IPsec should use NANOSEC & friends from time.h

@@ -1071,12 +1071,11 @@
          * msec. Convert interval (in msec) to hrtime (in nsec).
          */
 
         if (ipst->ips_ipsec_policy_log_interval) {
                 if (ipss->ipsec_policy_failure_last +
-                    ((hrtime_t)ipst->ips_ipsec_policy_log_interval *
-                    (hrtime_t)1000000) <= current) {
+                    MSEC2NSEC(ipst->ips_ipsec_policy_log_interval) <= current) {
                         va_start(adx, fmt);
                         (void) vstrlog(mid, sid, level, sl, fmt, adx);
                         va_end(adx);
                         ipss->ipsec_policy_failure_last = current;
                 }