Add support for TP-Link CPE210 v2

With our dynamic resetting of WiFi interfaces, the rssileds
of OpenWrt do not work correctly. This disables them as a
workaround, since they otherwise create about 20 % CPU load.

Since the MACH file for all CPE210/510 is the same, no adjustment
of the OpenWrt-tiny patch is needed.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Reviewed-by: Christian Dresel <fff@chrisi01.de>