add at24 driver

hc

2023-11-06 15ade055295d13f95d49e3d99b09f3bbfb4a43e7

 kernel/kernel/time/alarmtimer.c
..
..
@@ -438,7 +438,7 @@
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 		int ret = alarm_try_to_cancel(alarm);
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 		if (ret >= 0)
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 			return ret;
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-		cpu_relax();
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+		hrtimer_grab_expiry_lock(&alarm->timer);
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 	}
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 }
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 EXPORT_SYMBOL_GPL(alarm_cancel);