ath10k: detect the number of spatial streams supported by hw
Until now ath10k assumed 3 spatial streams. However some devices support only 2 spatial streams. This patch improves performance on devices that don't support 3 spatial streams. Signed-off-by: NMichal Kazior <michal.kazior@tieto.com> Signed-off-by: NKalle Valo <kvalo@qca.qualcomm.com>
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