pinctrl: rockchip: enable gpio pclk for rockchip_gpio_to_irq

There need to enable pclk_gpio when do irq_create_mapping, since it will
do access to gpio controller.

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Kever <Yang&lt;kever.yang@rock-chips.com>
Link: https://lore.kernel.org/r/20201013063731.3618-3-jay.xu@rock-chips.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>