r92su: update TODO

José Vázquez has tested the driver with:
  - TP-LINK TL-MR3220 v2. Wifi: AR9331 b/g/n OS: OpenWRT Driver: ath9k
  - Livebox 2. Wifi: AR9223 b/g/n OS: Linux 2.6.15 + OpenRG
    http://wiki.openwrt.org/toh/sagem/livebox.2
  - ARV4518PW. Wifi: AR2417 b/g OS: OpenWRT Driver: ath5k
    http://wiki.openwrt.org/toh/arcadyan/arv4518pw
  - Zyxel P660HW-D1. Wifi: Tnetw1350 b/g OS: ZynOS 3.x

Furthermore, I was able to confirm that the device
works with:
  - WNDR3700v2 Firmware 1.0.0.36
  - TP-Link TL-WR841ND v7 120201
  - AVM FritzBox! 7170
  - Alice SpeedBox (Not actually mine)

(As well as with several mac80211 aps)
  - ath9k_htc AP (WN721)
  - ath9k (R52N/AR9220, SR71-E/AR9280, ALL02456M/AR9380, N-1102/AR9382)
  - carl9170 AP (WNDA3100v1 and WN841N)
  - iwlagn (6200)
  - p54 (Allnet 0271, Dell 1450 USB)

Suspend and resume is also working.

throughput is the same as rtl8712u.