arm: mvebu: configs: turris_mox: Add 64 MiB of boot memory

This is needed for some scenarios, such as booting large FIT image.
Signed-off-by: NMarek Behún <marek.behun@nic.cz>
Reviewed-by: NStefan Roese <sr@denx.de>
Signed-off-by: NStefan Roese <sr@denx.de>

include/configs/turris_mox.h

@@ -8,6 +8,8 @@
 #ifndef _CONFIG_TURRIS_MOX_H
 #define _CONFIG_TURRIS_MOX_H
 
+#define CONFIG_SYS_BOOTM_LEN (64 << 20)
+
 #define CONFIG_LAST_STAGE_INIT
 
 /*