CONFIG_SOC_IMX27 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

i.MX27 support

modulename: clk-imx27.ko

and/or

cpu-imx27.ko

and/or

mm-imx27.ko

configname: CONFIG_SOC_IMX27

Linux Kernel Configuration
└─>Freescale i.MX family
└─>i.MX27 support
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
This enables support for Freescale i.MX27 processor

source code:
/arch/arm/mach-imx/


is selected by
CONFIG_VIDEO_MX2_EMMAPRP