configs: andes: add vender prefix for target name

Modify "CONFIG_TARGET_AE350" to "CONFIG_TARGET_ANDES_AE350"

Signed-off-by: Randolph <randolph@andestech.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ae350_rv64_spl_defconfig b/configs/ae350_rv64_spl_defconfig
index 4655050..5c3e622 100644
--- a/configs/ae350_rv64_spl_defconfig
+++ b/configs/ae350_rv64_spl_defconfig
@@ -9,7 +9,7 @@
 CONFIG_SPL_SYS_MALLOC_F_LEN=0x100000
 CONFIG_SPL=y
 CONFIG_SYS_LOAD_ADDR=0x100000
-CONFIG_TARGET_AE350=y
+CONFIG_TARGET_ANDES_AE350=y
 CONFIG_ARCH_RV64I=y
 CONFIG_RISCV_SMODE=y
 # CONFIG_AVAILABLE_HARTS is not set