wifi: iwlwifi: mvm: mark mac header with no data frames

Although no data is presented in the skb, but upper layers need it for
calculating where radio tap header are done, so we mark it.

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230305124406.8f53cc8579bf.I8819c005b4953cea03346d0aff82b31d94f79fe5@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c

@@ -2147,11 +2147,8 @@ void iwl_mvm_rx_monitor_no_data(struct iwl_mvm *mvm, struct napi_struct *napi,
 	 *
 	 * We mark it as mac header, for upper layers to know where
 	 * all radio tap header ends.
-	 *
-	 * Since data doesn't move data while putting data on skb and that is
-	 * the only way we use, data + len is the next place that hdr would be put
 	 */
-	skb_set_mac_header(skb, skb->len);
+	skb_reset_mac_header(skb);
 
 	/*
 	 * Override the nss from the rx_vec since the rate_n_flags has