configs: stm32mp13: Add support for baudrates higher than 115200

On STM32MP13x STMicroelectronics boards, the UART can reliably go up to
4000000 bauds when connected to the external ST-LINKV3.

This patch adds the support of higher baudrates on STMicroelectronics
STM32MP13x boards with ST-LINKV3.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/include/configs/stm32mp13_st_common.h b/include/configs/stm32mp13_st_common.h
index ec64b12..c51022b 100644
--- a/include/configs/stm32mp13_st_common.h
+++ b/include/configs/stm32mp13_st_common.h
@@ -14,4 +14,9 @@
 
 #include <configs/stm32mp13_common.h>
 
+/* uart with on-board st-link */
+#define CONFIG_SYS_BAUDRATE_TABLE      { 9600, 19200, 38400, 57600, 115200, \
+					 230400, 460800, 921600, \
+					 1000000, 2000000, 4000000}
+
 #endif