refactor(st): configure UART baudrate

Add the possibility to configure console UART baudrate, it can be passed
as a command line parameter with STM32MP_UART_BAUDRATE. The default value
remains 115200.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: I000df70c10b2b4dac1449556596f9820c36cf243
diff --git a/plat/st/common/stm32mp_common.c b/plat/st/common/stm32mp_common.c
index f99cad5..d922d3c 100644
--- a/plat/st/common/stm32mp_common.c
+++ b/plat/st/common/stm32mp_common.c
@@ -210,7 +210,7 @@
 	unsigned int console_flags;
 
 	if (console_stm32_register(base, clk_rate,
-				   STM32MP_UART_BAUDRATE, &console) == 0) {
+				   (uint32_t)STM32MP_UART_BAUDRATE, &console) == 0) {
 		panic();
 	}