pinctrl/rockchip: separate struct rockchip_pin_bank to a head file

[ Upstream commit e1450694 ]

Separate struct rockchip_pin_bank to pinctrl-rockchip.h file, which will
be used by gpio-rockchip driver in the future.

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Link: https://lore.kernel.org/r/20210816011948.1118959-3-jay.xu@rock-chips.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Stable-dep-of: 01b4b1d1 ("pinctrl: rockchip: use dedicated pinctrl type for RK3328")
Signed-off-by: Sasha Levin <sashal@kernel.org>