Set baud rate to 115200

Change-Id: I649d3a63b44d85a5570aed806af68eb3e24fc48b
diff --git a/configs/mt8516_coral_defconfig b/configs/mt8516_coral_defconfig
index 3994293..ffd5e7b 100644
--- a/configs/mt8516_coral_defconfig
+++ b/configs/mt8516_coral_defconfig
@@ -63,7 +63,7 @@
 CONFIG_PINCONF=y
 CONFIG_PINCTRL_MT8516=y
 CONFIG_RAM=y
-CONFIG_BAUDRATE=921600
+CONFIG_BAUDRATE=115200
 CONFIG_DM_SERIAL=y
 CONFIG_DEBUG_UART_MTK=y
 CONFIG_DEBUG_UART_ANNOUNCE=y