CONFIG_FSP2 is not available for the selected architecture x86.
Result is shown for architecture powerpc
IBM FSP2 (476fpe) Support
modulename: fsp2.ko
configname: CONFIG_FSP2
Linux Kernel Configuration
└─>IBM FSP2 (476fpe) Support
In linux kernel since version 3.10 (release Date: 2013-06-30)
This option enables support for the IBM FSP2 (476fpe) board