CONFIG_IMX_HAVE_IOMUX_V1 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_IMX_HAVE_IOMUX_V1 (not configurable)

modulename: iomux-v1.ko

configname: CONFIG_IMX_HAVE_IOMUX_V1

Linux Kernel Configuration
└─>Freescale i.MX family
└─>IMX_HAVE_IOMUX_V1
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
source code:
arch/arm/mach-imx/iomux-v1.c
depends
CONFIG_ARCH_MXC

is depended by
CONFIG_SOC_IMX1