gpiolib: remove duplicate inclusions

Remove second `#include <linux/err.h>`. Remove `#include <asm/errno.h>`
too as it's included by `err.h`.

Signed-off-by: Wang Jinchao <wangjinchao@xfusion.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

include/linux/gpio/driver.h

@@ -722,7 +722,6 @@ int gpiochip_irqchip_add_domain(struct gpio_chip *gc,
 #else
 
 #include <asm/bug.h>
-#include <asm/errno.h>
 
 static inline int gpiochip_irqchip_add_domain(struct gpio_chip *gc,
 					      struct irq_domain *domain)
@@ -811,8 +810,6 @@ const char *gpio_device_get_label(struct gpio_device *gdev);
 
 #else /* CONFIG_GPIOLIB */
 
-#include <linux/err.h>
-
 #include <asm/bug.h>
 
 static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)