net: sealevel: fix the code style issue about "foo* bar"

Fix the checkpatch error as "(foo*)" should be "(foo *)".
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/wan/sealevel.c

@@ -46,7 +46,7 @@ struct slvl_board
  *	Network driver support routines
  */
 
-static inline struct slvl_device* dev_to_chan(struct net_device *dev)
+static inline struct slvl_device *dev_to_chan(struct net_device *dev)
 {
 	return (struct slvl_device *)dev_to_hdlc(dev)->priv;
 }