tests: drivers: uart: moving struct declaration

Moving struct in preparation of wide test.

Signed-off-by: Jeroen van Dooren <[email protected]>

Author: JvanDooren

tests/drivers/uart/uart_basic_api/src/test_uart_config.c

@@ -25,7 +25,6 @@
  */
 
 #include "test_uart.h"
-struct uart_config uart_cfg_check;
 const struct uart_config uart_cfg = {
 		.baudrate = 115200,
 		.parity = UART_CFG_PARITY_NONE,
@@ -58,6 +57,7 @@ static int test_configure(void)
 /* test UART configure get (retrieve configuration) */
 static int test_config_get(void)
 {
+	struct uart_config uart_cfg_check;
 	const struct device *const uart_dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_console));
 
 	if (!device_is_ready(uart_dev)) {