iwlwifi: mvm: BT Coex - duplicate the command if sent ASYNC

There are buses that can't handle ASYNC command without
copying them. Duplicate the host command instead.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

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

@@ -776,7 +776,7 @@ static int iwl_mvm_bt_coex_reduced_txp(struct iwl_mvm *mvm, u8 sta_id,
 	struct iwl_host_cmd cmd = {
 		.id = BT_CONFIG,
 		.len = { sizeof(*bt_cmd), },
-		.dataflags = { IWL_HCMD_DFL_NOCOPY, },
+		.dataflags = { IWL_HCMD_DFL_DUP, },
 		.flags = CMD_ASYNC,
 	};
 	struct iwl_mvm_sta *mvmsta;