stm32: Convert serial driver to DM

Signed-off-by: Kamil Lulko <kamil.lulko@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/include/asm/arch-stm32f4/stm32.h b/arch/arm/include/asm/arch-stm32f4/stm32.h
index 7ca6dc3..6b64d03 100644
--- a/arch/arm/include/asm/arch-stm32f4/stm32.h
+++ b/arch/arm/include/asm/arch-stm32f4/stm32.h
@@ -3,7 +3,7 @@
  * Yuri Tikhonov, Emcraft Systems, yur@emcraft.com
  *
  * (C) Copyright 2015
- * Kamil Lulko, <rev13@wp.pl>
+ * Kamil Lulko, <kamil.lulko@gmail.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
@@ -106,6 +106,14 @@
 #define STM32_FLASH_CR_SNB_OFFSET	3
 #define STM32_FLASH_CR_SNB_MASK		(15 << STM32_FLASH_CR_SNB_OFFSET)
 
+/*
+ * Peripheral base addresses
+ */
+#define STM32_USART1_BASE	(STM32_APB2PERIPH_BASE + 0x1000)
+#define STM32_USART2_BASE	(STM32_APB1PERIPH_BASE + 0x4400)
+#define STM32_USART3_BASE	(STM32_APB1PERIPH_BASE + 0x4800)
+#define STM32_USART6_BASE	(STM32_APB2PERIPH_BASE + 0x1400)
+
 enum clock {
 	CLOCK_CORE,
 	CLOCK_AHB,