drivers: misc: coresight: nrf_etr: Imply UART asynchronous API

Asynchronous API is recommended to be used by ETR buffer handler but
polling is also supported. Imply UART_ASYNC_API so that it is possible
to disable it in project config and fall back to polling if needed. For
example to reduce memory footprint.

Signed-off-by: Krzysztof Chruściński <[email protected]>

Author: nordic-krch

drivers/misc/coresight/Kconfig

@@ -7,6 +7,7 @@ config NRF_ETR
 	bool "Coresight ETR handler (with Nordic TBM)"
 	depends on $(dt_compat_enabled,$(DT_COMPAT_NORDIC_NRF_TBM))
 	select NRFX_TBM
+	imply UART_ASYNC_API
 	default y
 	help
 	  Module handles data stored in the ETR circular buffer (e.g. STM logging