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

CONFIG_ARM_AMBA (not configurable)

configname: CONFIG_ARM_AMBA

Linux Kernel Configuration
└─>Bus support
└─>ARM_AMBA
In linux kernel since version 2.6.12  
is selected by
CONFIG_PL330_DMA

is depended by
CONFIG_MACH_EXYNOS4_DT