usb: phy: tegra: Replace of_gpio.h by proper one

of_gpio.h is deprecated and subject to remove.
The driver doesn't use it directly, replace it
with what is really being used.

Signed-off-by: Andy Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

include/linux/usb/tegra_usb_phy.h

···
 #define __TEGRA_USB_PHY_H
 
 #include <linux/clk.h>
-#include <linux/gpio.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
 #include <linux/usb/otg.h>
+
+struct gpio_desc;
 
 /*
  * utmi_pll_config_in_car_module: true if the UTMI PLL configuration registers