CONFIG_MACH_MX53_SMD is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Support MX53 SMD platforms
modulename: mach-mx53_smd.ko
configname: CONFIG_MACH_MX53_SMD
Linux Kernel Configuration
└─>Support MX53 SMD platforms
In linux kernel since version 2.6.38 (release Date: 2011-03-14)
Include support for MX53 SMD platform. This includes specific
configurations for the board and its peripherals.
configurations for the board and its peripherals.