ddc-i2c-bus routed for HDMI is not i2c2 but i2c5 on
Vyasa RK3288 board.

Add support for fixing the same.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Link: https://lore.kernel.org/r/20200123134641.30720-2-jagan@amarulasolutions.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>