helios4: fix helios4-wol.service (wake-on-lan) (#8235)

* helios4: fix wake-on-lan (wol)

- added ethtool package
- enable wol on all ethernet interfaces
- support common systemd.net-naming-schemes (ethX/endX/enoX)

* Update helios4-wol.service

Removed test code.

* Update helios4-wol.service

Fix bug after retesting.

config/boards/helios4.conf

@@ -13,4 +13,5 @@ KERNEL_TEST_TARGET="current"
 
 function post_family_config__helios4_extra_packages() {
 	add_packages_to_image "fancontrol"
+	add_packages_to_image "ethtool"
 }

packages/bsp/mvebu/helios4/helios4-wol.service

@@ -4,7 +4,7 @@ After=network-online.target
 Wants=network-online.target
 
 [Service]
-ExecStart=/sbin/ethtool -s eth0 wol g
+ExecStart=/bin/sh -c '/bin/ls -1 /sys/class/net/ | /bin/grep -E "^(eth|en[do])[0-9]+" | /bin/xargs -n1 -I{} /sbin/ethtool -s "{}" wol g'
 Type=oneshot
 
 [Install]