oxnas: rework 02_network

Just like other targets do, introduce two setup functions for interfaces and
MAC addresses.

Signed-off-by: Sungbo Eo <mans0n@gorani.run>

target/linux/oxnas/base-files/etc/board.d/02_network

@@ -3,10 +3,6 @@
 . /lib/functions/uci-defaults.sh
 . /lib/functions/system.sh
 
-board_config_update
-
-lan_mac=""
-
 bootloader_cmdline_var() {
 	local param
 	local pval
@@ -31,15 +27,35 @@ legacy_boot_mac_adr() {
 	IFS="$oIFS"
 }
 
-case "$(board_name)" in
-	"shuttle,kd20")
+oxnas_setup_interfaces()
+{
+	local board="$1"
+
+	case $board in
+	*)
+		ucidef_set_interface_lan "eth0" "dhcp"
+		;;
+	esac
+}
+
+oxnas_setup_macs()
+{
+	local board="$1"
+	local lan_mac=""
+
+	case $board in
+	shuttle,kd20)
 		lan_mac="$(legacy_boot_mac_adr)"
 		;;
-esac
+	esac
 
-ucidef_set_interface_lan "eth0" "dhcp"
-[ -n "$lan_mac" ] && ucidef_set_interface_macaddr "lan" "$lan_mac"
+	[ -n "$lan_mac" ] && ucidef_set_interface_macaddr "lan" $lan_mac
+}
 
+board_config_update
+board=$(board_name)
+oxnas_setup_interfaces $board
+oxnas_setup_macs $board
 board_config_flush
 
 exit 0