ipmi:bt-bmc: Avoid unnecessary check

bt_bmc_probe() is only called with an openfirmware platform device.
Therefore there is no need to check that the passed in device is NULL or
that it has an openfirmware node.
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Message-Id: <20200408115958.2848-1-tangbin@cmss.chinamobile.com>
[Fixed the title up a bit.]
Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/bt-bmc.c

@@ -430,9 +430,6 @@ static int bt_bmc_probe(struct platform_device *pdev)
 	struct device *dev;
 	int rc;
 
-	if (!pdev || !pdev->dev.of_node)
-		return -ENODEV;
-
 	dev = &pdev->dev;
 	dev_info(dev, "Found bt bmc device\n");