default or selected kernelversion does not have config value CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEFAULT.
Result is shown for kernelversion 6.9.9

Qualcomm download mode enabled by default

configname: CONFIG_QCOM_SCM_DOWNLOAD_MODE_DEFAULT

Linux Kernel Configuration
└─>Device Drivers
└─>Firmware Drivers
└─>Qualcomm download mode enabled by default
In linux kernel since version 3.10 (release Date: 2013-06-30)  
A device with "download mode" enabled will upon an unexpected
warm-restart enter a special debug mode that allows the user to
"download" memory content over USB for offline postmortem analysis.
The feature can be enabled/disabled on the kernel command line.

Say Y here to enable "download mode" by default.

depends
CONFIG_QCOM_SCM