add dts config

hc

2023-12-06 08f87f769b595151be1afeff53e144f543faa614

 kernel/include/uapi/linux/gsmmux.h
..
..
@@ -37,5 +37,7 @@
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 #define GSMIOC_ENABLE_NET      _IOW('G', 2, struct gsm_netconfig)
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 #define GSMIOC_DISABLE_NET     _IO('G', 3)
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+/* get the base tty number for a configured gsmmux tty */
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+#define GSMIOC_GETFIRST		_IOR('G', 4, __u32)
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 #endif