configs: andes: rearrange SPL mode memory layout

Unify the memory layout for u-boot SPL mode
Add "CONFIG_SPL_OPENSBI_SCRATCH_OPTIONS"

Signed-off-by: Randolph <randolph@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/configs/ae350_rv64_spl_xip_defconfig b/configs/ae350_rv64_spl_xip_defconfig
index 3cb3444..6f8f9f5 100644
--- a/configs/ae350_rv64_spl_xip_defconfig
+++ b/configs/ae350_rv64_spl_xip_defconfig
@@ -7,7 +7,8 @@
 CONFIG_ENV_SECT_SIZE=0x1000
 CONFIG_DEFAULT_DEVICE_TREE="ae350_64"
 CONFIG_SPL_TEXT_BASE=0x80000000
-CONFIG_SPL_SYS_MALLOC_F_LEN=0x100000
+CONFIG_SYS_PROMPT="RISC-V # "
+CONFIG_SPL_SYS_MALLOC_F_LEN=0x2000000
 CONFIG_SPL=y
 CONFIG_SYS_LOAD_ADDR=0x100000
 CONFIG_TARGET_ANDES_AE350=y
@@ -23,10 +24,11 @@
 CONFIG_DISPLAY_BOARDINFO=y
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_SPL_MAX_SIZE=0x100000
-CONFIG_SPL_BSS_START_ADDR=0x4000000
+CONFIG_SPL_BSS_START_ADDR=0x400000
 CONFIG_SPL_BOARD_INIT=y
 CONFIG_SPL_CACHE=y
 CONFIG_SYS_PROMPT="RISC-V # "
+CONFIG_SPL_OPENSBI_SCRATCH_OPTIONS=0x0
 CONFIG_SYS_PBSIZE=1050
 CONFIG_SYS_BOOTM_LEN=0x4000000
 CONFIG_CMD_IMLS=y