arm/bL_switcher: Use kthread_run_on_cpu()

Use the proper API instead of open coding it.

Reviewed-by: Dave Martin <[e-mail]>
Acked-by: Nicolas Pitre <[e-mail]>
Signed-off-by: Frederic Weisbecker <[e-mail]>

arch/arm/common/bL_switcher.c

···
 {
 	struct task_struct *task;
 
-	task = kthread_create_on_node(bL_switcher_thread, arg,
-				      cpu_to_node(cpu), "kswitcher_%d", cpu);
-	if (!IS_ERR(task)) {
-		kthread_bind(task, cpu);
-		wake_up_process(task);
-	} else
+	task = kthread_run_on_cpu(bL_switcher_thread, arg,
+				  cpu, "kswitcher_%d");
+	if (IS_ERR(task))
 		pr_err("%s failed for CPU %d\n", __func__, cpu);
+
 	return task;
 }