10096 kstat update routines shouldn't check for NULL kstat

@@ -14073,11 +14073,11 @@
         ill_t *ill;
         netstackid_t    stackid = (zoneid_t)(uintptr_t)kp->ks_private;
         netstack_t      *ns;
         ip_stack_t      *ipst;
 
-        if (kp == NULL || kp->ks_data == NULL)
+        if (kp->ks_data == NULL)
                 return (EIO);
 
         if (rw == KSTAT_WRITE)
                 return (EACCES);
 

@@ -14210,11 +14210,11 @@
         icmp_named_kstat_t *icmpkp;
         netstackid_t    stackid = (zoneid_t)(uintptr_t)kp->ks_private;
         netstack_t      *ns;
         ip_stack_t      *ipst;
 
-        if ((kp == NULL) || (kp->ks_data == NULL))
+        if (kp->ks_data == NULL)
                 return (EIO);
 
         if (rw == KSTAT_WRITE)
                 return (EACCES);