board: nx25-ae250: Rename as ax25-ae350

Rename
 nx25 as ax25
 ae250 as ae350
 nx25-ae250 as ax25-ae350
 including filename, variable, string and definition.

Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Cc: Greentime Hu <green.hu@gmail.com>
diff --git a/board/AndesTech/ax25-ae350/Kconfig b/board/AndesTech/ax25-ae350/Kconfig
new file mode 100644
index 0000000..bb69ea3
--- /dev/null
+++ b/board/AndesTech/ax25-ae350/Kconfig
@@ -0,0 +1,24 @@
+if TARGET_AX25_AE350
+
+config SYS_CPU
+	default "ax25"
+
+config SYS_BOARD
+	default "ax25-ae350"
+
+config SYS_VENDOR
+	default "AndesTech"
+
+config SYS_SOC
+	default "ae350"
+
+config SYS_CONFIG_NAME
+	default "ax25-ae350"
+
+config ENV_SIZE
+	default 0x2000 if ENV_IS_IN_SPI_FLASH
+
+config ENV_OFFSET
+	default 0x140000 if ENV_IS_IN_SPI_FLASH
+
+endif