RT72064. stm3220g-eval: increase the size of internal RAM buffer

This will help us to debug support for ext 32 PSRAM. Now internal
RAM buffer has size of 88KB, and it's enough to put u-boot.bin there
for self-update purposes.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

include/configs/stm3220g-eval.h

@@ -100,9 +100,9 @@
 #define CONFIG_MEM_NVM_LEN		(1024 * 1024)
 
 #define CONFIG_MEM_RAM_BASE		0x20000000
-#define CONFIG_MEM_RAM_LEN		(32 * 1024)
-#define CONFIG_MEM_RAM_BUF_LEN		(32 * 1024)
-#define CONFIG_MEM_MALLOC_LEN		(60 * 1024)
+#define CONFIG_MEM_RAM_LEN		(20 * 1024)
+#define CONFIG_MEM_RAM_BUF_LEN		(88 * 1024)
+#define CONFIG_MEM_MALLOC_LEN		(16 * 1024)
 #define CONFIG_MEM_STACK_LEN		(4 * 1024)
 
 /*