CONFIG_ARCH_REALVIEW is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
ARM Ltd. RealView family
modulename: clk-realview.ko
configname: CONFIG_ARCH_REALVIEW
ARM system type
└─>ARM Ltd. RealView family
In linux kernel since version 2.6.15 (release Date: 2006-01-02)
This enables support for ARM Ltd RealView boards.