This patch adds a new RGB media bus formats that describe
18-bit samples transferred over an LVDS bus with three
differential data pairs, serialized into 7 time slots,
using standard JEIDA data ordering.
Change-Id: Ia0bedd53e57aa34829a0d61b144aa99a1c98cffd
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>