CONFIG_BOARD_SPEAR300_EVB is not available for the selected architecture x86.
Result is shown for architecture arm
SPEAr300 Evaluation Board
modulename: spear300_evb.ko
configname: CONFIG_BOARD_SPEAR300_EVB
Linux Kernel Configuration
└─>SPEAr3xx Implementations
└─>SPEAr300 Evaluation Board
In linux kernel since version 2.6.35 (release Date: 2010-08-01)
Supports ST SPEAr300 Evaluation Board