octeon/generic: ubnt,erlite: define profile

Currently the erlite install shows Model as EBNT_E100, uses eth0 as lan,
eth1 as wan, and doesn't use eth2.

- define dts for this device, such that we get a cleaner naming here
- fix handing of this device to inlude eth2
- change eth0 to wan, like er-4/usg/etc as it once was intended

Fixes: https://github.com/openwrt/openwrt/issues/14946
Signed-off-by: Fabian Groffen <grobian@gentoo.org>
Link: https://github.com/openwrt/openwrt/pull/17758
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

target/linux/octeon/base-files/lib/upgrade/platform.sh

@@ -47,7 +47,7 @@ platform_copy_config_helper() {
 
 platform_copy_config() {
 	case "$(board_name)" in
-	erlite|\
+	ubnt,erlite|\
 	ubnt,usg)
 		platform_copy_config_helper /dev/sda1 vfat
 		;;
@@ -132,7 +132,7 @@ platform_do_upgrade() {
 	ubnt,edgerouter-6p)
 		kernel=/dev/mmcblk0p1
 		;;
-	erlite|\
+	ubnt,erlite|\
 	ubnt,usg)
 		kernel=/dev/sda1
 		;;
@@ -161,10 +161,10 @@ platform_check_image() {
 
 	case "$board" in
 	er | \
-	erlite | \
 	itus,shield-router | \
 	ubnt,edgerouter-4 | \
 	ubnt,edgerouter-6p | \
+	ubnt,erlite | \
 	ubnt,usg | \
 	cisco,vedge1000)
 		local kernel_length=$(tar xf $tar_file $board_dir/kernel -O | wc -c 2> /dev/null)