CONFIG_DOVE_LEGACY is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_DOVE_LEGACY (not configurable)

modulename: irq.ko

configname: CONFIG_DOVE_LEGACY

Linux Kernel Configuration
└─>Marvell Dove
└─>DOVE_LEGACY
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
/arch/arm/mach-dove/