arm64: dts: rockchip: fix i2c resource error of rk3368

According to the TRM and downstream code from rockchip, the register
address of i2c1 on rk3368 is 0xff660000 and i2c2 is 0xff140000.

This patch fix the i2c1 & i2c2 register address definition error, also
fix the clk and pinctrl reference error.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>