ath11k: fix uninitialized variable radioup

The variable radioup is not uninitalized so it may contain a garbage
value and hence the detection of a radio that is not up is buggy.
Fix this by initializing it to zero.

Addresses-Coverity: ("Uninitalized scalar variable")
Fixes: d5c65159 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/ath11k/debug.c

@@ -541,7 +541,7 @@ static ssize_t ath11k_write_simulate_fw_crash(struct file *file,
 	struct ath11k *ar = ab->pdevs[0].ar;
 	char buf[32] = {0};
 	ssize_t rc;
-	int i, ret, radioup;
+	int i, ret, radioup = 0;
 
 	for (i = 0; i < ab->num_radios; i++) {
 		pdev = &ab->pdevs[i];