usb: chipidea: fix static checker warning for NULL pointer

During the static checker, "data->usbmisc_data" may be NULL.
Fix it by adding this pointer judgement before using.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/ci_hdrc_imx.c

@@ -316,7 +316,8 @@ static int ci_hdrc_imx_probe(struct platform_device *pdev)
 	if (IS_ERR(data->usbmisc_data))
 		return PTR_ERR(data->usbmisc_data);
 
-	if (of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC) {
+	if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
+		&& data->usbmisc_data) {
 		pdata.flags |= CI_HDRC_IMX_IS_HSIC;
 		data->usbmisc_data->hsic = 1;
 		data->pinctrl = devm_pinctrl_get(dev);