sampes: shell: remove usage of CONFIG_USB_UART_CONSOLE

Remove option CONFIG_USB_UART_CONSOLE where it has no influence
or enable CONFIG_SHELL_BACKEND_SERIAL_CHECK_DTR without taking
a detour through CONFIG_USB_UART_CONSOLE.

Check the compatibility of chosen property instead
of usage of CONFIG_USB_UART_CONSOLE option.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
3 files changed