ath10k: support up to 64 vdevs

The (1 << x) - 1 trick won't work when you
are trying to fill up all 64 bits, so add special
case for that.
Signed-off-by: Ben Greear <greearb@candelatech.com>
[kvalo@qca.qualcomm.com: remove the sentence about moving limits]
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/core.c

@@ -1972,6 +1972,9 @@ int ath10k_core_start(struct ath10k *ar, enum ath10k_firmware_mode mode,
 		goto err_hif_stop;
 	}
 
+	if (ar->max_num_vdevs >= 64)
+		ar->free_vdev_map = 0xFFFFFFFFFFFFFFFFLL;
+	else
 		ar->free_vdev_map = (1LL << ar->max_num_vdevs) - 1;
 
 	INIT_LIST_HEAD(&ar->arvifs);