rockchip: rk3288: Add i2s pinctrl and clock support

Add support for setting pinctrl and clock for I2S on rk3288. This allows
the sound driver to operate. These settings were created by rkmux.py

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
5 files changed