[U-Boot] rockchip: rk322x: Disable integrated macphy for saving power consuming

[Philipp Tomsich]

> Unfortunately, the integrated macphy default is enabled, which will
> increase power consuming, if we do not use this PHY. So let's disable
> it at first, which will save power consuming. If we really use it, then
> enable it in driver level.
> 
> Signed-off-by: David Wu <david.wu at rock-chips.com>
> Reviewed-by: Kever Yang <kever.yang at rock-chips.com>
> ---
>  arch/arm/include/asm/arch-rockchip/grf_rk322x.h | 32 +++++++++++++++++++++++++
>  arch/arm/mach-rockchip/rk322x-board.c           |  8 +++++++
>  2 files changed, 40 insertions(+)
> 

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