pinctrl: rockchip: allow to build for TPL

A later commit will make use of the pinctrl driver in TPL so let's add
the ability to build the Rockchip pinctrl driver in TPL.

Reviewed-by: Paul Kocialkowski <paulk@sys-base.io>
Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2 files changed