regulator: rpi-panel-attiny: Drop useless header

The RPI panel regulator driver includes the legacy header
<linux/gpio.h> for no reason, this is a driver and <linux/gpio/driver.h>
is already included. Drop the include.

Signed-off-by: Linus Walleij <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/rpi-panel-attiny-regulator.c

···
 
 #include <linux/backlight.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
 #include <linux/gpio/driver.h>
 #include <linux/i2c.h>
 #include <linux/init.h>