ath6kl: Cosmetic change in checking for free vif slot

A minor optimization is done in finding the free slot
available for the new virtual interface in the firmware.

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
1 file changed