ath9k: avoid aggregation for VO traffic
ath9k: avoid aggregation for VO traffic

This should help with latency issues which can happen when
using aggregation.

Cc: Matt Smith <9fa5768f621e52e77093d6e8b340a4111242a397@atheros.com>
Cc: Senthil Balasubramanian <7094968178b585a1b7f86797bd192fcf0753c99f@atheros.com>
Signed-off-by: Luis R. Rodriguez <79e6b8107a8aa3944e09fad43634662ac3b91a0b@atheros.com>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas