STM32 MCU fixes/cleanup:

_ Fix SPL console for STM32F769 Discovery
 _ Fix Memory Protection Unit size for STM32F4 series
 _ Cleanup DT for STM32F746 Discovery
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Merge tag 'u-boot-stm32-20190628' of https://gitlab.denx.de/u-boot/custodians/u-boot-stm

STM32 MCU fixes/cleanup:
- Fix SPL console for STM32F769 Discovery
- Fix Memory Protection Unit size for STM32F4 series
- Cleanup DT for STM32F746 Discovery

arch/arm/dts/stm32f746-disco-u-boot.dtsi

@@ -78,10 +78,6 @@
 	};
 };
 
-&clk_hse {
-	u-boot,dm-pre-reloc;
-};
-
 &fmc {
 	/* Memory configuration from sdram datasheet MT48LC_4M32_B2B5-6A */
 	bank1: bank@0 {
@@ -123,9 +119,7 @@
 	};
 
 	fmc_pins: fmc@0 {
-		u-boot,dm-pre-reloc;
 		pins {
-			u-boot,dm-pre-reloc;
 			pinmux = <STM32_PINMUX('D',10, AF12)>, /* D15 */
 				 <STM32_PINMUX('D', 9, AF12)>, /* D14 */
 				 <STM32_PINMUX('D', 8, AF12)>, /* D13 */

arch/arm/dts/stm32f769-disco-u-boot.dtsi

@@ -152,6 +152,16 @@
 			slew-rate = <2>;
 		};
 	};
+
+	usart1_pins_a: usart1@0	{
+		u-boot,dm-pre-reloc;
+		pins1 {
+			u-boot,dm-pre-reloc;
+		};
+		pins2 {
+			u-boot,dm-pre-reloc;
+		};
+	};
 };
 
 &qspi {

arch/arm/mach-stm32/soc.c

@@ -18,7 +18,7 @@ int arch_cpu_init(void)
 		 */
 #if defined(CONFIG_STM32F4)
 		{ 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
-		O_I_WB_RD_WR_ALLOC, REGION_16MB },
+		O_I_WB_RD_WR_ALLOC, REGION_512MB },
 #endif
 
 		{ 0x90000000, REGION_1, XN_DIS, PRIV_RW_USR_RW,