i2c: efm32: Avoid unnecessary check in efm32_i2c_probe()

The function efm32_i2c_probe() is only called with an
openfirmware platform device.Therefore there is no need
to check that it has an openfirmware node.
Signed-off-by: Shengju Zhang <zhangshengju@cmss.chinamobile.com>
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

drivers/i2c/busses/i2c-efm32.c

@@ -312,9 +312,6 @@ static int efm32_i2c_probe(struct platform_device *pdev)
 	int ret;
 	u32 clkdiv;
 
-	if (!np)
-		return -EINVAL;
-
 	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
 	if (!ddata)
 		return -ENOMEM;