configs: andes: add watchdog support fot andes ae350

It adds the ATCWDT200 support for Andes AE350 platform.
It also enables wdt command support.

Signed-off-by: CL Wang <cl634@andestech.com>
Signed-off-by: Randolph <randolph@andestech.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/configs/ae350_rv64_spl_defconfig b/configs/ae350_rv64_spl_defconfig
index 68ac432..e929320 100644
--- a/configs/ae350_rv64_spl_defconfig
+++ b/configs/ae350_rv64_spl_defconfig
@@ -33,6 +33,7 @@
 CONFIG_CMD_IMLS=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_SF_TEST=y
+CONFIG_CMD_WDT=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_BOOTP_PREFER_SERVERIP=y
 CONFIG_CMD_CACHE=y
@@ -58,3 +59,6 @@
 CONFIG_SPI=y
 CONFIG_ATCSPI200_SPI=y
 # CONFIG_BINMAN_FDT is not set
+# CONFIG_WATCHDOG_AUTOSTART is not set
+CONFIG_WDT=y
+CONFIG_WDT_ATCWDT200=y