CONFIG_MACH_SPEAR320 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
SPEAr320
modulename: spear320.ko
configname: CONFIG_MACH_SPEAR320
SPEAr3XX Family
└─>SPEAr320
In linux kernel since version 2.6.35 (release Date: 2010-08-01)
Supports ST SPEAr320 Machine