nfc: st-nci: Remove unnecessary variable

The variable r is defined at the beginning and initialized
to 0 until the function returns r, and the variable r is
not reassigned.Therefore, we do not need to define the
variable r, just return 0 directly at the end of the function.

Signed-off-by: wengjianfeng <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/nfc/st-nci/se.c

···
 						   u8 event,
 						   struct sk_buff *skb)
 {
-	int r = 0;
 	struct st_nci_info *info = nci_get_drvdata(ndev);
 
 	pr_debug("apdu reader gate event: %x\n", event);
···
 	}
 
 	kfree_skb(skb);
-	return r;
+	return 0;
 }
 
 /*