* add DFI driver to provide hardware-based memory controller load
* adapted DRAM Memory Controller driver from rk3328, add necessary headers
* provide device tree overlays to enable DDR3 clock scaling
* adapted rk322x-box to allow DDR speed bin selection to user
* add ipb900 board gpio configuration
* add rtl8723cs driver to linux-current kernel
* use ddrbin v1.10 set to 330 Mhz at boot
* provide overlays for ddr3 at 330, 528, 660 and 800 mhz
* split emmc overlays to enable options by user choice
* modified rk322x-config to support dmc, emmc overlays
* remove optee trust os in favor of rockchip proprietary blob
for dmc functionality
