msm: ipa: Fix ipa3_wwan_xmit return type

This change will fix the error seen with CFI for the return type of
ipa3_wwan_xmit.

Change-Id: Ib201debb338295f3a83bf07f51e0434cd3519db4
Acked-by: Priyadarshini Rajagopal <prajagop@qti.qualcomm.com>
Signed-off-by: Chaitanya Pratapa <cpratapa@codeaurora.org>

drivers/platform/msm/ipa/ipa_v3/rmnet_ipa.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2014-2019, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2014-2020, The Linux Foundation. All rights reserved.
  */
 
 /*
@@ -1172,7 +1172,7 @@ static int ipa3_wwan_change_mtu(struct net_device *dev, int new_mtu)
  * later
  * -EFAULT: Error while transmitting the skb
  */
-static int ipa3_wwan_xmit(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t ipa3_wwan_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	int ret = 0;
 	bool qmap_check;