Commit 7ebbbda293 ("ar71xx: ubnt-(xm,xw): fix LED RSSI indication")
adds support for using the RSSI strenght via LEDS.
The rssileds package addition got lost during altering the patch.
Add it again to fix this.
Fixes: 7ebbbda293 ("ar71xx: ubnt-(xm,xw): fix LED RSSI indication")
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>