[U-Boot] [U-Boot, 1/4] rockchip: rk3288: Add i2s pinctrl and clock support

[Philipp Tomsich]

> 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 at chromium.org>
> ---
> 
>  .../include/asm/arch-rockchip/cru_rk3288.h    |  8 ++
>  .../include/asm/arch-rockchip/grf_rk3288.h    | 96 +++++++++++++++++++
>  arch/arm/include/asm/arch-rockchip/periph.h   |  1 +
>  drivers/clk/rockchip/clk_rk3288.c             | 48 ++++++++++
>  drivers/pinctrl/rockchip/pinctrl_rk3288.c     | 14 +++
>  5 files changed, 167 insertions(+)
> 

Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>