default or selected kernelversion does not have config value CONFIG_STE_MODEM_RPROC.
Result is shown for kernelversion 6.5.1

STE-Modem remoteproc support

modulename: ste_modem_rproc.ko

configname: CONFIG_STE_MODEM_RPROC

Linux Kernel Configuration
└─>Device Drivers
└─>Remoteproc drivers
└─>STE-Modem remoteproc support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say y or m here to support STE-Modem shared memory driver.
This can be either built-in or a loadable module.
If unsure say N.

source code: