board: stm32: fix extra env setings addresses

For stm32f4, f7 and h7 boards, reserve:
 - 4MB for kernel
 - 64KB for fdt, boot script, pxefile
 - the remaining memory for ramdisk

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick DELAUNAY <patrick.delaunay@st.com>
diff --git a/include/configs/stm32f746-disco.h b/include/configs/stm32f746-disco.h
index 337b999..6d82a9c 100644
--- a/include/configs/stm32f746-disco.h
+++ b/include/configs/stm32f746-disco.h
@@ -48,12 +48,12 @@
 #define CONFIG_EXTRA_ENV_SETTINGS				\
 			"kernel_addr_r=0xC0008000\0"		\
 			"fdtfile=stm32f746-disco.dtb\0"	\
-			"fdt_addr_r=0xC0500000\0"		\
-			"scriptaddr=0xC0008000\0"		\
-			"pxefile_addr_r=0xC0008000\0" \
+			"fdt_addr_r=0xC0408000\0"		\
+			"scriptaddr=0xC0418000\0"		\
+			"pxefile_addr_r=0xC0428000\0" \
+			"ramdisk_addr_r=0xC0438000\0"		\
 			"fdt_high=0xffffffffffffffff\0"		\
 			"initrd_high=0xffffffffffffffff\0"	\
-			"ramdisk_addr_r=0xC0600000\0"		\
 			BOOTENV
 
 /*