====== structure of kconfig data ======

===== basic: option =====

  * name: **option**
  * attribs:
    * **symbol** -- name of the config option. refers to ''CONFIG_''... in ''.config''
    * **flags** -- bit vector carrying flags
    * **flag** -- a verbatim decoded flag from **flags**
    * **prompt** -- the text prompted by ''menuconfig''
    * **help** -- help text shown by ''menuconfig''
    * **type** -- the data type (boolean, tristate, string, int, hex) handled by ''menuconfig''
    * **visible** -- visibility
    * **property.symbol** -- 
    * **property.prompt** --
    * **property.default** -- default values & conditions for which they apply
    * **file** -- the corresponding line of the kconfig file
    * **lineno** -- the corresponding kconfig file
    * **menupath** -- navigation path inside menu config

===== menu =====

  * name: **menu**
  * attribs: 
    * **symbol** -- the text prompted by ''menuconfig''
  * contents:
    * **option**
    * **menu**
    * **menuconfig**
    * **choice**

===== menuconfig =====

  * name: **menuconfig**

===== choice =====

  * name: **choice**