PCI: designware-plat: Drop unused include

This file does not use the symbols from the legacy <linux/gpio.h> header,
so drop it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://patch.msgid.link/20260506084858.867884-3-andriy.shevchenko@linux.intel.com

Author: andy-shev

drivers/pci/controller/dwc/pcie-designware-plat.c

@@ -8,7 +8,6 @@
  */
 #include <linux/clk.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/init.h>