libertas: make lbs_init_mesh() void

Fix the following coccicheck warning:

drivers/net/wireless/marvell/libertas/mesh.c:833:5-8: Unneeded variable:
"ret". Return "0" on line 874
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200410090942.27239-1-yanaijie@huawei.com

drivers/net/wireless/marvell/libertas/mesh.c

@@ -828,10 +828,8 @@ static void lbs_persist_config_remove(struct net_device *dev)
  * Check mesh FW version and appropriately send the mesh start
  * command
  */
-int lbs_init_mesh(struct lbs_private *priv)
+void lbs_init_mesh(struct lbs_private *priv)
 {
-	int ret = 0;
-
 	/* Determine mesh_fw_ver from fwrelease and fwcapinfo */
 	/* 5.0.16p0 9.0.0.p0 is known to NOT support any mesh */
 	/* 5.110.22 have mesh command with 0xa3 command id */
@@ -870,8 +868,6 @@ int lbs_init_mesh(struct lbs_private *priv)
 
 	/* Stop meshing until interface is brought up */
 	lbs_mesh_config(priv, CMD_ACT_MESH_CONFIG_STOP, 1);
-
-	return ret;
 }
 
 void lbs_start_mesh(struct lbs_private *priv)

drivers/net/wireless/marvell/libertas/mesh.h

@@ -16,7 +16,7 @@
 
 struct net_device;
 
-int lbs_init_mesh(struct lbs_private *priv);
+void lbs_init_mesh(struct lbs_private *priv);
 void lbs_start_mesh(struct lbs_private *priv);
 int lbs_deinit_mesh(struct lbs_private *priv);