andes: Unify naming policy for Andes related source

Signed-off-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 7e20ef6..fa3b016 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -80,7 +80,7 @@
 	  Sifive core devices that uses L2 cache to store SPL.
 
 # board-specific options below
-source "board/AndesTech/ae350/Kconfig"
+source "board/andestech/ae350/Kconfig"
 source "board/emulation/qemu-riscv/Kconfig"
 source "board/microchip/mpfs_icicle/Kconfig"
 source "board/openpiton/riscv64/Kconfig"
@@ -93,7 +93,7 @@
 source "board/xilinx/mbv/Kconfig"
 
 # platform-specific options below
-source "arch/riscv/cpu/andesv5/Kconfig"
+source "arch/riscv/cpu/andes/Kconfig"
 source "arch/riscv/cpu/cv1800b/Kconfig"
 source "arch/riscv/cpu/fu540/Kconfig"
 source "arch/riscv/cpu/fu740/Kconfig"