iwlwifi: out-of-bounds access in iwl_init_sband_channels

KASan error report:
==================================================================
BUG: KASan: out of bounds access in iwl_init_sband_channels+0x207/0x260 [iwlwifi] at addr ffff8800c2d0aac8
Read of size 4 by task modprobe/329
==================================================================

Both loops of this function compare data from the 'chan' array and then
check if the index is valid.

The 2 conditions should be inverted to avoid an out-of-bounds access.
Signed-off-by: NAdrien Schildknecht <adrien+dev@schischi.me>
Signed-off-by: NEmmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/iwl-eeprom-parse.c

@@ -713,12 +713,12 @@ int iwl_init_sband_channels(struct iwl_nvm_data *data,
 	struct ieee80211_channel *chan = &data->channels[0];
 	int n = 0, idx = 0;
 
-	while (chan->band != band && idx < n_channels)
+	while (idx < n_channels && chan->band != band)
 		chan = &data->channels[++idx];
 
 	sband->channels = &data->channels[idx];
 
-	while (chan->band == band && idx < n_channels) {
+	while (idx < n_channels && chan->band == band) {
 		chan = &data->channels[++idx];
 		n++;
 	}