tests: update uart driver api test case

Depending on test environment, termination character could
be '/r' instead of '/n'.
Enabling both possibilities.

Change-Id: I18b47e9055667e0a4f868416ee8d01226a879712
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>

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

diff --git a/tests/drivers/uart/uart_basic_api/src/test_uart_fifo.c b/tests/drivers/uart/uart_basic_api/src/test_uart_fifo.c
index f6f93f1..3f4245d 100644
--- a/tests/drivers/uart/uart_basic_api/src/test_uart_fifo.c
+++ b/tests/drivers/uart/uart_basic_api/src/test_uart_fifo.c
@@ -60,7 +60,7 @@
 		uart_fifo_read(dev, &recvData, 1);
 		TC_PRINT("%c", recvData);
 
-		if (recvData == '\n') {
+		if ((recvData == '\n') || (recvData == '\r')) {
 			data_received = true;
 		}
 	}

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

diff --git a/tests/drivers/uart/uart_basic_api/src/test_uart_poll.c b/tests/drivers/uart/uart_basic_api/src/test_uart_poll.c
index 93cb663..42bb1f7 100644
--- a/tests/drivers/uart/uart_basic_api/src/test_uart_poll.c
+++ b/tests/drivers/uart/uart_basic_api/src/test_uart_poll.c
@@ -49,7 +49,7 @@
 
 		TC_PRINT("%c", recvChar);
 
-		if (recvChar == '\n') {
+		if ((recvChar == '\n') || (recvChar == '\r')) {
 			break;
 		}
 	}