Move the alias node of the TP-Link WR841v9 and rename the phandle of
the qss led to qss_led in preparation for adding the very similar
TP-Link WR841v11.
Signed-off-by: Johann Neuhauser <johann@it-neuhauser.de>
Remove SUPPORTED_DEVICES from wr841-v9 because it´s not needed and
for consistency rename everything to tl-wr841-v9.
Signed-off-by: Johann Neuhauser <johann@it-neuhauser.de>