ipmi_ssif: Fix uninitialized variable issue

Currently, function ssif_remove returns _rv_, which is a variable that
is never initialized.

Fix this by removing variable _rv_ and return 0 instead.

Addresses-Coverity-ID: 1467999 ("Uninitialized scalar variable")
Fixes: 6a0d23ed ("ipmi: ipmi_unregister_smi() cannot fail, have it
return void")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/ipmi_ssif.c

@@ -1227,7 +1227,6 @@ static int ssif_remove(struct i2c_client *client)
 	struct ssif_info *ssif_info = i2c_get_clientdata(client);
 	struct ipmi_smi *intf;
 	struct ssif_addr_info *addr_info;
-	int rv;
 
 	if (!ssif_info)
 		return 0;
@@ -1247,7 +1246,7 @@ static int ssif_remove(struct i2c_client *client)
 		}
 	}
 
-	return rv;
+	return 0;
 }
 
 static int do_cmd(struct i2c_client *client, int len, unsigned char *msg,