add support ota

hc

2023-02-18 a08c8b75ee83d7f62c9aefc23bfb42082aa4076c

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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);