zephyr/serial_recovery: fix serial device binding

zephyr changes the way in which it provide name of
serial device used by serial recover.
see: https://github.com/zephyrproject-rtos/zephyr/pull/18752

This path introduce build time configuration of device name
which is set to exact the same device which was set before.

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
diff --git a/boot/zephyr/Kconfig b/boot/zephyr/Kconfig
index d7c92bc..e0a7c02 100644
--- a/boot/zephyr/Kconfig
+++ b/boot/zephyr/Kconfig
@@ -248,6 +248,18 @@
 	  Logic value of the detect pin which triggers serial recovery
 	  mode.
 
+# Workaround for not being able to have commas in macro arguments
+DT_CHOSEN_Z_CONSOLE := zephyr,console
+
+config RECOVERY_UART_DEV_NAME
+	string "UART Device Name for Recovery UART"
+	default "$(dt_chosen_label,$(DT_CHOSEN_Z_CONSOLE))" if HAS_DTS
+	default "UART_0"
+	depends on BOOT_SERIAL_UART
+	help
+	  This option specifies the name of UART device to be used for
+	  serial recovery.
+
 endif # MCUBOOT_SERIAL
 
 endmenu