iwlwifi: mvm: use array indexing instead of treating it as a pointer

It's a bit strange to treat an array as a pointer, so use proper
array indexing instead.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/mvm/mac80211.c

@@ -262,9 +262,9 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
 
 	/* currently FW API supports only one optional cipher scheme */
-	if (mvm->fw->cs->cipher) {
+	if (mvm->fw->cs[0].cipher) {
 		mvm->hw->n_cipher_schemes = 1;
-		mvm->hw->cipher_schemes = mvm->fw->cs;
+		mvm->hw->cipher_schemes = &mvm->fw->cs[0];
 	}
 
 #ifdef CONFIG_PM_SLEEP