drm/bridge/nxp-ptn3460: Drop legacy GPIO headers

This driver uses exclusively the new GPIO API from
<linux/gpio/consumer.h> so just drop the old API headers.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190708113009.12723-1-linus.walleij@linaro.orgSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpu/drm/bridge/nxp-ptn3460.c

@@ -6,13 +6,10 @@
  */
 
 #include <linux/delay.h>
-#include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
-
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>