CONFIG_ARCH_MXC is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Freescale i.MX family
configname: CONFIG_ARCH_MXC
Linux Kernel Configuration
└─>Freescale i.MX family
In linux kernel since version 2.6.23 (release Date: 2007-10-09)
Support for Freescale MXC/iMX-based family of processors
selects
CONFIG_ARCH_HAS_OPPCONFIG_ARCH_REQUIRE_GPIOLIB
CONFIG_ARM_CPU_SUSPEND
CONFIG_CLKSRC_MMIO
CONFIG_GENERIC_IRQ_CHIP
CONFIG_PINCTRL
CONFIG_PM_OPP
CONFIG_SOC_BUS
CONFIG_SRAM