Staging: dwc2: remove a kfree(NULL)

dwc2_hcd_release() calls dwc2_hcd_free() which frees ->core_params
and sets it to NULL.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dwc2/hcd.c

@@ -2940,7 +2940,6 @@ void dwc2_hcd_remove(struct device *dev, struct dwc2_hsotg *hsotg)
 	usb_remove_hcd(hcd);
 	hsotg->priv = NULL;
 	dwc2_hcd_release(hsotg);
-	kfree(hsotg->core_params);
 
 #ifdef CONFIG_USB_DWC2_TRACK_MISSED_SOFS
 	kfree(hsotg->last_frame_num_array);