Support initial ramdisk/ramfs compressed using bzip2

configname: CONFIG_RD_BZIP2

Linux Kernel Configuration
└─>Support initial ramdisk/ramfs compressed using bzip2
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
Support loading of a bzip2 encoded initial ramdisk or cpio buffer
If unsure, say N.