This reverts the usage of the S-Tag for separating LAN and WAN port on
the embedded switch. Many users complained about not being able to
manage C-Tag addition / removal on the switch as well as degraded
performance.
Fixes: commit 9da2b56760 ("ipq40xx: fix ethernet vlan double tagging")
Signed-off-by: David Bauer <mail@david-bauer.net>
The target uses 5.4 as default kernel since 03/2020.
Kernel 4.19 support is not really maintained anymore, it does not
seem to be needed, and removing it will make upcoming driver
updates easier. Thus, remove it.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>