CONFIG_DRAGEN2 is not available for thedefaultarchitecture x86.
Result is shown for architecture m68k

DragenEngine II board support

modulename: dragen2.ko

and/or

configname: CONFIG_DRAGEN2

Linux Kernel Configuration
└─>DragenEngine II board support
In linux kernel since version 2.6.12  
Support for the DragenEngine II board.