add nk_io at24_eeprom driver

hc

2023-02-14 796a7ef0befd21e25c2b9e42f53a6d7a4421941d

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#ifndef OS_UTILS_H
#define OS_UTILS_H
#ifdef __cplusplus
extern "C" {
#endif
 
__attribute ((visibility("default"))) char *os_strdup(char *src);
 
#ifdef __cplusplus
}
#endif
#endif