CONFIG_MACH_IMX27IPCAM is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

IMX27 IPCAM platform

modulename: mach-imx27ipcam.ko

configname: CONFIG_MACH_IMX27IPCAM

Linux Kernel Configuration
└─>Freescale i.MX support
└─>IMX27 IPCAM platform
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Include support for IMX27 IPCAM platform. This includes specific
configurations for the board and its peripherals.

source code:
arch/arm/mach-imx/mach-imx27ipcam.c