shell/shell_module/overlay-usb.conf

CONFIG_USB_DEVICE_STACK=y
CONFIG_USB_DEVICE_PRODUCT="Zephyr USB shell sample"
CONFIG_SHELL_BACKEND_SERIAL_CHECK_DTR=y
CONFIG_UART_LINE_CTRL=y
CONFIG_SHELL_BACKEND_SERIAL_INIT_PRIORITY=51
CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=n