ARM: dts: rockchip: re-configure rk3288-evb-rk1608 board

The rk3288-evb-rk1608 board doesn't share with rk3288-evb, so we
need to separate a new indepentent type of rk3288-evb-rk1608 board.

For now, these primary features have been confirmed on rk3288-evb-rk1608
board:
- The power supply for RK1608 by syr827 via i2c4
- EMMC
- MIPI LCD display
- USB HOST
- GMAC RMII
- WLAN(AP6335)
- TF CARD

Change-Id: Iee2e237027d541498ecf4d893ad6416ebc0d5c02
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>

Author: acgzx