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/serial_adapter.c b/boot/zephyr/serial_adapter.c
index c78480b..92815a6 100644
--- a/boot/zephyr/serial_adapter.c
+++ b/boot/zephyr/serial_adapter.c
@@ -191,7 +191,7 @@
 boot_uart_fifo_init(void)
 {
 #ifdef CONFIG_BOOT_SERIAL_UART
-	uart_dev = device_get_binding(DT_UART_CONSOLE_ON_DEV_NAME);
+	uart_dev = device_get_binding(CONFIG_RECOVERY_UART_DEV_NAME);
 #elif CONFIG_BOOT_SERIAL_CDC_ACM
 	uart_dev = device_get_binding(CONFIG_USB_CDC_ACM_DEVICE_NAME "_0");
 #endif