Using the builtin I2C controller in dw_hdmi is better than using the
normal RK3288 I2C controller(I2C5).
Test: work normally when switch mode between 4K@60hz|4K@30hz|1080P..
Change-Id: Ifb4b72ca5649efb0cc3055f2db34ebbcc2377c4c Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>