linux-4.1.y: ath10k: fix qca61x4 hw2.1 support

[Kalle Valo]

Hi stable team,

please take the commit below to linux-4.1.y stable releases. It fixes a
long standing issue with qca61x4 hw2.1 support reported by multiple
users. This commit is already on 4.2 release. It will not apply to 4.0
or older, so take it only to 4.1.y branch.

commit 11a002efbaa7fbd9f6e616695ab42aa9f1caf060
Author: Michal Kazior <michal.kazior at tieto.com>
Date:   Mon Apr 20 09:20:41 2015 +0000

    ath10k: fix qca61x4 hw2.1 support

-- 
Kalle Valo