pinctrl: rockchip: support rk3588 pinctrl

pinctrl: rockchip: support rk3588 pinctrl

Add support for Rockchip rk3588 variant of pinctrl.

The driver is adapted from the Linux driver.

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
[eugen.hristev@collabora.com:
port to latest U-boot, bring more changes from Linux
use translated pull values table]
Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Tested-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Jonas Karlman <jonas@kwiboo.se>