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

Versatile Express Serial Power Controller (SPC)

modulename: spc.ko


Linux Kernel Configuration
└─>ARM Ltd. Versatile Express family
└─>Versatile Express Serial Power Controller (SPC)
In linux kernel since version 3.10 (release Date: 2013-06-30)  
The TC2 (A15x2 A7x3) versatile express core tile integrates a logic
block called Serial Power Controller (SPC) that provides the interface
between the dual cluster test-chip and the M3 microcontroller that
carries out power management.

source code: