gpio: cadence: Remove duplicated include in gpio-cadence.c

The header files linux/gpio/driver.h is included twice in gpio-cadence.c,
so one inclusion of each can be removed.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=22931


Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Link: https://lore.kernel.org/r/20250723064608.2178024-1-yang.lee@linux.alibaba.com


Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>