config: remove HAVE_KERNEL_TIMER_SETUP

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #16479

module/os/linux/spl/spl-taskq.c

@@ -262,7 +262,7 @@ task_expire_impl(taskq_ent_t *t)
 }
 
 static void
-task_expire(spl_timer_list_t tl)
+task_expire(struct timer_list *tl)
 {
 	struct timer_list *tmr = (struct timer_list *)tl;
 	taskq_ent_t *t = from_timer(t, tmr, tqent_timer);