Modifying Zephyr bootflow to skip ESP32 AT commands

Hello all!

I’m new to the risc-v eco-system and I’m using the zephyr os (new to that too) as a way to learn. I’ve got a board that thinks it is a hifive1 revb (really a sparkfun red-v) and I’m getting tired of seeing failed AT commands at the beginning of boot. I dug around a bit but could not piece together where to make this modification - looking first at the device tree and defconfig options then a bit at the code and googling. I got the understanding (please correct) that the source code for this lives outside the zephyr repo.

Any pointers to save myself from going down the rabbit hole unnecessarily are much appreciated.