ath10k: fix survey reporting

Number of channels is stored in a separate macro
in a header file and channel list is constructed
independently. The macro is used to define survey
array.

This fixes a recent regression introduced after
adding support for 144 channel. The regression
would lead to a warning and incomplete survey data
on channel 165:

  chan info: invalid frequency 5825 (idx 38 out of bounds)

Also make sure to enforce the sizes and avoid this
kind of problem in the future.

Fixes: 4a7898fed5 ("ath10k: enable channel 144 on 5GHz band")
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

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

@@ -45,7 +45,7 @@
 #define WMI_READY_TIMEOUT (5 * HZ)
 #define ATH10K_FLUSH_TIMEOUT_HZ (5*HZ)
 #define ATH10K_CONNECTION_LOSS_HZ (3*HZ)
-#define ATH10K_NUM_CHANS 38
+#define ATH10K_NUM_CHANS 39
 
 /* Antenna noise floor */
 #define ATH10K_DEFAULT_NOISE_FLOOR -95

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

@@ -6016,6 +6016,10 @@ int ath10k_mac_register(struct ath10k *ar)
 	ht_cap = ath10k_get_ht_cap(ar);
 	vht_cap = ath10k_create_vht_cap(ar);
 
+	BUILD_BUG_ON((ARRAY_SIZE(ath10k_2ghz_channels) +
+		      ARRAY_SIZE(ath10k_5ghz_channels)) !=
+		     ATH10K_NUM_CHANS);
+
 	if (ar->phy_capability & WHAL_WLAN_11G_CAPABILITY) {
 		channels = kmemdup(ath10k_2ghz_channels,
 				   sizeof(ath10k_2ghz_channels),