phy: sun4i-usb: Remove unused of_gpio.h

of_gpio.h is deprecated and subject to remove. The drivers in question
don't use it, simply remove the unused header.

Signed-off-by: Andy Shevchenko <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: andy-shev

drivers/phy/allwinner/phy-sun4i-usb.c

@@ -23,7 +23,6 @@
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/phy/phy.h>
 #include <linux/phy/phy-sun4i-usb.h>
 #include <linux/platform_device.h>