add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/tty/n_hdlc.c
..
..
@@ -100,6 +100,7 @@
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 #include <asm/termios.h>
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 #include <linux/uaccess.h>
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+#include "tty.h"
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 /*
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  * Buffers for individual HDLC frames