add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/rtc/rtc-bq4802.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* rtc-bq4802.c: TI BQ4802 RTC driver.
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  *
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  * Copyright (C) 2008 David S. Miller <davem@davemloft.net>