rockchip: i2c: rk3328: support i2c for rk3328 SoC

Add compatible to support rk3328 i2c

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Heiko <Schocher&lt;hs@denx.de>