Description of flash.cfg format
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1. each line define one partition
2. maximum number of partitions is 16
3. order of partitions are same like lines in the file
4. line format: <partition name> <flags/type> <size> <data filename>
    partition name  - up to 15 chars, shown in MTD later
    size            - can be related to filesize: "filesize", "filesize+10M", "filesize+10b", 
                      or have fixed size:  "10M", "100b"
                      [M - means Megabytes, b - menas blocks (each NAND block is 128kbytes)]
                      can be "allsize" for auto size partition.
    flags/type      - can be different values:
        
    types:
        "ya"  - YAFFS2 partition. MAGLDR can show root directory context or read kernel/initrd from it
        "raw" - RAW data.     

    flags:
        "ro"    - disable add extra 5% to partition size and count bad blocks into size
        "boot"  - this partition contains zImage and initrd.gz for NAND boot (it must have YAFFS2 type)
        "asize" - auto size. this partition will use all available space after other partitions. only one partition can have this type.
        "nospr" - binary data have not spare data. (2048+0 format), otherwise 2048+64 format used.
        "nors"  - use exactly specified size for partition. no resize is done.
        "hr"    - this partition must be erased if user select "AD HardReset" in MAGLDR menu.
        
    different flags and types separated via "|" symbol, like "boot|ya|ro"