ARM: tegra: Move panels to AUX bus

Move the eDP panel on Venice 2 and Nyan boards into the corresponding
AUX bus device tree node. This allows us to avoid a nasty circular
dependency that would otherwise be created between the DPAUX and panel
nodes via the DDC/I2C phandle.

Fixes: eb481f9a ("ARM: tegra: add Acer Chromebook 13 device tree")
Fixes: 59fe02cb ("ARM: tegra: Add DTS for the nyan-blaze board")
Fixes: 40e231c7 ("ARM: tegra: Enable eDP for Venice2")
Signed-off-by: Thierry Reding <treding@nvidia.com>