usb: dwc3: xilinx: Remove unused of_gpio,h

of_gpio.h provides a single function, which is not used in this driver.
Remove unused header.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20230215165239.83806-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: andy-shev

drivers/usb/dwc3/dwc3-xilinx.c

@@ -14,7 +14,6 @@
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/gpio/consumer.h>
-#include <linux/of_gpio.h>
 #include <linux/of_platform.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>