CONFIG_MACH_LPD7A400 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MACH_LPD7A400.
Result is shown for kernelversion 5.4.69

LPD7A400 Card Engine

modulename: arch-lpd7a40x.ko

configname: CONFIG_MACH_LPD7A400

Linux Kernel Configuration
└─>LH7A40X Implementations
└─>LPD7A400 Card Engine
In linux kernel since version 2.6.12  
Say Y here if you are using Logic Product Development's
LPD7A400 CardEngine. For the time being, the LPD7A400 and
LPD7A404 options are mutually exclusive.

source code:
/arch/arm/mach-lh7a40x/