Merge tag 'u-boot-stm32-20190523' of https://github.com/pchotard/u-boot

- Add various STM32MP1 fixes for serial, env, clk, board, i2c ...

- Add STM32MP1 DDR driver update:
	These update introduce the DDR interactive mode described in:
	https://wiki.st.com/stm32mpu/index.php/U-Boot_SPL:_DDR_interactive_mode

	This mode is used by the CubeMX: DDR tuning tool.
	https://wiki.st.com/stm32mpu/index.php/STM32CubeMX

	The DDR interactive mode is NOT activated by default because
	it increase the SPL size and slow down the boot time
	(200ms wait added).

include/configs/stm32mp1.h

@@ -22,11 +22,6 @@
 #define CONFIG_ARMV7_SECURE_MAX_SIZE		STM32_SYSRAM_SIZE
 #endif
 
-/*
- * malloc() pool size
- */
-#define CONFIG_SYS_MALLOC_LEN			SZ_32M
-
 /*
  * Configuration of the external SRAM memory used by U-Boot
  */
@@ -43,11 +38,6 @@
  */
 #define CONFIG_SYS_LOAD_ADDR			STM32_DDR_BASE
 
-/*
- * Env parameters
- */
-#define CONFIG_ENV_SIZE				SZ_4K
-
 /* ATAGs */
 #define CONFIG_CMDLINE_TAG
 #define CONFIG_SETUP_MEMORY_TAGS
@@ -95,8 +85,6 @@
  * for nand boot, boot with on ubifs partition on nand
  * for nor boot, use the default order
  */
-#define CONFIG_PREBOOT
-
 #define STM32MP_BOOTCMD "bootcmd_stm32mp=" \
 	"echo \"Boot over ${boot_device}${boot_instance}!\";" \
 	"if test ${boot_device} = serial || test ${boot_device} = usb;" \