ar71xx: add rssileds for Ubiquiti XM boards

Adds support for the received signal strength indicator LEDs of the
Bullet M, Nanostation M and Rocket M devices.

Signed-off-by: Felix Kaechele <heffer@fedoraproject.org>
Patchwork: http://patchwork.openwrt.org/patch/5108/
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40471 3c298f89-4303-0410-b956-a3cf2f4a3e73
ar71xx: fix typos in TP-Link rssileds definition

Signed-off-by: Felix Kaechele <heffer@fedoraproject.org>
Patchwork: http://patchwork.openwrt.org/patch/5109/
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40472 3c298f89-4303-0410-b956-a3cf2f4a3e73