rteth_930x_decode_tag() and rteth_931x_decode_tag() are basically
the same. The only difference is the port bitmask. Luckily on the
RTL930x devices the unused fifth bit is always zero and the mask
can be aligned with RTL931x. Take over the RTL931x reason debugging
for both targets.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/22717
Signed-off-by: Robert Marko <robimarko@gmail.com>