drm/panel: rpi: Drop unused GPIO includes

The Rpi panel driver doesn't use any symbols from these
GPIO includes so just drop them.

Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203152655.159281-1-linus.walleij@linaro.org

drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c

@@ -44,8 +44,6 @@
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/fb.h>
-#include <linux/gpio.h>
-#include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/of.h>