serial: stm32x7: migrate serial struct to driver

This allow to remove include/dm/platform_data/serial_stm32x7.h
which was included in the past by stm32x7 driver and by
stm32f746-disco.c board file.
Since patch 42bf5e7c27 "serial: stm32f7: add device tree support"
this file is no more needed in board file.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Vikas MANOCHA <vikas.manocha@st.com>

board/st/stm32f746-disco/stm32f746-disco.c

@@ -14,7 +14,6 @@
 #include <asm/arch/stm32.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/fmc.h>
-#include <dm/platform_data/serial_stm32x7.h>
 #include <asm/arch/stm32_periph.h>
 #include <asm/arch/stm32_defs.h>
 #include <asm/arch/syscfg.h>

drivers/serial/serial_stm32x7.c

@@ -11,7 +11,6 @@
 #include <asm/io.h>
 #include <serial.h>
 #include <asm/arch/stm32.h>
-#include <dm/platform_data/serial_stm32x7.h>
 #include "serial_stm32x7.h"
 
 DECLARE_GLOBAL_DATA_PTR;

drivers/serial/serial_stm32x7.h

@@ -22,6 +22,11 @@ struct stm32_usart {
 	u32 tx_dr;
 };
 
+/* Information about a serial port */
+struct stm32x7_serial_platdata {
+	struct stm32_usart *base;  /* address of registers in physical memory */
+	unsigned int clock;
+};
 
 #define USART_CR1_OVER8			(1 << 15)
 #define USART_CR1_TE			(1 << 3)

include/dm/platform_data/serial_stm32x7.h

@@ -1,17 +0,0 @@
-/*
- * (C) Copyright 2016
- * Vikas Manocha, <vikas.manocha@st.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#ifndef __SERIAL_STM32x7_H
-#define __SERIAL_STM32x7_H
-
-/* Information about a serial port */
-struct stm32x7_serial_platdata {
-	struct stm32_usart *base;  /* address of registers in physical memory */
-	unsigned int clock;
-};
-
-#endif /* __SERIAL_STM32x7_H */