tasklets: Switch tasklet_disable() to the sleep wait variant

 -- NOT FOR IMMEDIATE MERGING --

Now that all users of tasklet_disable() are invoked from sleepable context,
convert it to use tasklet_unlock_wait() which might sleep.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210309084242.726452321@linutronix.de

include/linux/interrupt.h

@@ -711,8 +711,7 @@ static inline void tasklet_disable_in_atomic(struct tasklet_struct *t)
 static inline void tasklet_disable(struct tasklet_struct *t)
 {
 	tasklet_disable_nosync(t);
-	/* Spin wait until all atomic users are converted */
-	tasklet_unlock_spin_wait(t);
+	tasklet_unlock_wait(t);
 	smp_mb();
 }