configs: starfive: Disable SYS_MALLOC_CLEAR_ON_INIT by default

SPL_SYS_MALLOC_CLEAR_ON_INIT would enable SYS_MALLOC_CLEAR_ON_INIT by
default, but that's not need on JH7110, so disable that.

Signed-off-by: Shengyu Qu <wiagn233@outlook.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/configs/starfive_visionfive2_defconfig b/configs/starfive_visionfive2_defconfig
index 3002c96..9df6fce 100644
--- a/configs/starfive_visionfive2_defconfig
+++ b/configs/starfive_visionfive2_defconfig
@@ -59,6 +59,8 @@
 CONFIG_HAS_CUSTOM_SPL_MALLOC_START=y
 CONFIG_CUSTOM_SYS_SPL_MALLOC_ADDR=0x80000000
 CONFIG_SYS_SPL_MALLOC_SIZE=0x400000
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SPL_SYS_MALLOC_CLEAR_ON_INIT=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_PARTITION=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION=0x2
 CONFIG_SPL_I2C=y