configs: rk3288: Increase bootm length

Increase bootm length to 64MB satisfy max gunzip
size, even other rockchip and know SoC are following
same length check.

Reported-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/include/configs/rk3288_common.h b/include/configs/rk3288_common.h
index bcda769..910fe58 100644
--- a/include/configs/rk3288_common.h
+++ b/include/configs/rk3288_common.h
@@ -9,7 +9,7 @@
 #include <asm/arch-rockchip/hardware.h>
 #include "rockchip-common.h"
 
-#define CONFIG_SYS_BOOTM_LEN (16 << 20) /* 16MB */
+#define CONFIG_SYS_BOOTM_LEN		(64 << 20) /* 64MB */
 
 #define CONFIG_SKIP_LOWLEVEL_INIT_ONLY
 #define CONFIG_SYS_CBSIZE		1024