automation: fix xilinx test console settings

The test showed unreliable behavior due to unsupported console settings.
Update the baud rate used to connect to the UART.

Signed-off-by: Victor Lira <victorm.lira@amd.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
(cherry picked from commit c23571fe31)

automation/gitlab-ci/test.yaml

@@ -102,7 +102,7 @@
   variables:
     CONTAINER: ubuntu:xenial-xilinx
     LOGFILE: xilinx-smoke-x86_64.log
-    XEN_CMD_CONSOLE: "console=com2 com2=115200,8n1,0x2F8,4"
+    XEN_CMD_CONSOLE: "console=com2 com2=57600,8n1,0x2F8,4"
     TEST_BOARD: "crater"
     TEST_TIMEOUT: 1000
   artifacts:

automation/scripts/xilinx-smoke-dom0-x86_64.sh

@@ -129,7 +129,7 @@ sleep 5
 sh /scratch/gitlab-runner/${TEST_BOARD}.sh 1
 sleep 5
 set +e
-stty -F ${SERIAL_DEV} 115200
+stty -F ${SERIAL_DEV} 57600
 
 # Capture test result and power off board before exiting.
 export PASSED="${PASS_MSG}"