Samsung pinctrl drivers changes for v6.10
1. Add support for toggling bus clock (PCLK) for any pin controller
register accesses. This looks needed on newer Samsung chips, like
Google GS101 and probably Exynos850.
2. Drop old, deprecated in v6.1 bindings header with register constants.
The constants were moved to DTS headers.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>