CONFIG_ARCH_STMP37XX is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_STMP37XX.
Result is shown for kernelversion 5.4.69

Freescale SMTP37xx

modulename: stmp37xx.ko

configname: CONFIG_ARCH_STMP37XX

Select STMP3xxx chip family
└─>Freescale SMTP37xx
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
STMP37xx refers to 3700 through 3769 chips

source code:
arch/arm/mach-stmp37xx/stmp37xx.c