add 4 io

hc

2023-08-21 ef9e1ccebba20d2e3859126411166909a383f483

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u32 jffs2_1pass_ls(struct part_info *part,const char *fname);
u32 jffs2_1pass_load(char *dest, struct part_info *part,const char *fname);
u32 jffs2_1pass_info(struct part_info *part);