HID: i2c-hid: also call i2c_hid_free_buffers in i2c_hid_remove

In the case where the hid driver in charge of handling the hid part
of the device (hid-generic for instance) fails at probe, neither
i2c_hid_start nor i2c_hid_stop are called.
Thus, the buffers allocated in i2c_hid_probe are never freed.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/i2c-hid/i2c-hid.c

@@ -908,6 +908,9 @@ static int __devexit i2c_hid_remove(struct i2c_client *client)
 
 	free_irq(client->irq, ihid);
 
+	if (ihid->bufsize)
+		i2c_hid_free_buffers(ihid);
+
 	kfree(ihid);
 
 	return 0;