stm32f746-disco: enable flash support

This patch enables embedded flash for stm32f746 discovery board.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>

arch/arm/include/asm/arch-stm32f7/stm32.h

@@ -50,6 +50,12 @@
 
 #define SDRAM_FMC_BASE		(AHB3_PERIPH_BASE + 0x4A0000140)
 
+static const u32 sect_sz_kb[CONFIG_SYS_MAX_FLASH_SECT] = {
+	[0 ... 3] =	32 * 1024,
+	[4] =		128 * 1024,
+	[5 ... 7] =	256 * 1024
+};
+
 enum clock {
 	CLOCK_CORE,
 	CLOCK_AHB,

include/configs/stm32f746-disco.h

@@ -9,7 +9,7 @@
 #define __CONFIG_H
 
 #define CONFIG_SYS_THUMB_BUILD
-#define CONFIG_SYS_NO_FLASH
+/*#define CONFIG_SYS_NO_FLASH*/
 
 #define CONFIG_OF_LIBFDT
 #define CONFIG_BOARD_EARLY_INIT_F
@@ -33,17 +33,14 @@
 #define CONFIG_SYS_LOAD_ADDR		0x20000000
 #define CONFIG_LOADADDR			0x20000000
 
-#define CONFIG_SYS_MAX_FLASH_SECT	12
-#define CONFIG_SYS_MAX_FLASH_BANKS	2
+#define CONFIG_SYS_MAX_FLASH_SECT	8
+#define CONFIG_SYS_MAX_FLASH_BANKS	1
 
-#ifndef CONFIG_SYS_NO_FLASH
-#define CONFIG_ENV_IS_IN_FLASH
-#else
 #define CONFIG_ENV_IS_NOWHERE
-#endif
 #define CONFIG_ENV_SIZE			(8 << 10)
 
 #define CONFIG_STM32_GPIO
+#define CONFIG_STM32_FLASH
 #define CONFIG_STM32X7_SERIAL
 
 #define CONFIG_SYS_CLK_FREQ		16*1000*1000 /* 180 MHz */