gpio: rockchip: convert to dynamic GPIO base allocation

This driver is used on device tree based platform. Use dynamic
GPIO numberspace base to suppress the warning:

gpio gpiochip0: Static allocation of GPIO base is deprecated, use dynamic allocation.
gpio gpiochip1: Static allocation of GPIO base is deprecated, use dynamic allocation.
gpio gpiochip2: Static allocation of GPIO base is deprecated, use dynamic allocation.
gpio gpiochip3: Static allocation of GPIO base is deprecated, use dynamic allocation.
gpio gpiochip4: Static allocation of GPIO base is deprecated, use dynamic allocation.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/1774864401-177149-1-git-send-email-shawn.lin@rock-chips.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>

Author: shawn1221

drivers/gpio/gpio-rockchip.c

@@ -582,7 +582,7 @@ static int rockchip_gpiolib_register(struct rockchip_pin_bank *bank)
 	bank->gpio_chip = rockchip_gpiolib_chip;
 
 	gc = &bank->gpio_chip;
-	gc->base = bank->pin_base;
+	gc->base = -1;
 	gc->ngpio = bank->nr_pins;
 	gc->label = bank->name;
 	gc->parent = bank->dev;