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/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 06fae7e..183885e 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -8,8 +8,8 @@
 	prompt "Target select"
 	optional
 
-config TARGET_AE350
-	bool "Support ae350"
+config TARGET_ANDES_AE350
+	bool "Support Andes ae350"
 
 config TARGET_MICROCHIP_ICICLE
 	bool "Support Microchip PolarFire-SoC Icicle Board"